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The family Leiopelmidae* is considered by all recent authorities as the most primitive among the living Salientia (Noble, 1922, 1931; Slabbert and Maree, 1945; Millard, 1949, etc.). It has therefore several times attracted the attention of zoologists (Archey, 1922; Noble and Putnam, 1931; Wagner, 1934a, b; de Villiers, 1934a, b; de Vos, 1938–39a, b, etc.). Until recently, however, its vascular anatomy was completely unknown.
Blood vessels are a very interesting and important part of amphibian anatomy and are at present being studied rather extensively (Bhaduri, 1930, 1931, 1938; Bhaduri and Ghose, 1943; Millard, 1941, 1942, 1945, 1949; Paterson, 1942; Szarski, 1937, 1948, etc.) with interesting results. I was therefore very glad to dissect some specimens of Leiopelma sent to me from New Zealand through the courtesy of Professor K. Wodzicki. When the work was already finished I learned that an account of the blood vessels of Leiopelma had been published by E. M. and N. G. Stephenson (1947). In the following notice therefore I do not attempt to give a full description of the vascular anatomy of that genus, especially as my material was very limited; I shall only discuss some details not observed by the Stephensons, or especially interesting when compared with other Salientians.
I had at my disposal three female specimens of Leiopelma hochstetteri Fitz., collected in a stream at Huia, Waitakere Ranges, Auckland, North Island, New Zealand, July 21, 1947, by Mr. E. G. Turbott. The animals were injected with Indian ink through the truncus arteriosus by Professor L. R. Richardson in Wellington. The dissections were performed under a low-power binocular microscope. In none of the animals were all the blood vessels completely filled with ink. Nevertheless, in all the specimens it was possible to examine the larger arteries and veins, and in one animal even the finer vessels were almost completely injected, especially in the region of the head and trunk.
The general plan is very similar to that found in the majority of Salientia (E. M. and N. G. Stephenson, Szarski, 1947), only a few points deserve special attention.
[Footnote] * As pointed by Turbott (1942), the original spelling of the generic name is Leiopelma, not Liopelma.
A. coeliaco-mesenterica is given off from the ventral aorta about 1 mm. caudad from the point of union of the right and left thoracic aortae, as in Bombina.
A. mesenterica caudalis was present in all three animals investigated. The Stephensons give to this artery the name of the anterior haemorrhoidal.
Text Fig. 1. The branching off of the middle sacral artery. A.caud., aorta caudalis; A.il.comm., a. ilica communis; A.mes.caud., a. mesenterica caudalis; Aor.ab., aorta abdominalis.
As stressed by the Stephensons, the large cutaneous artery is a spacious vessel. Its diameter equals the diameter of the pulmonary artery. It runs in a cranio-dorsal direction, surrounds the scapula craniad and divides into three vessels very similar to those found in Rana esculenta, namely: ramus lateralis arteriae cutaneae magnae, r. auricularis a.c.m., and r. dorsalis a.c.m.
R. lateralis a.c.m. corresponds to the continuation of the large cutaneous artery in Bombina, Pelobates and Bufo (Szarski, 1948). It runs caudad directly under the skin which it supplies.
R. auricularis a.c.m. runs craniad exactly as in Rana, reaches the skull and bends in a curve ventrad, finally supplying the thymus and the muscles of the mandibular joint. It does not, however, anastomose with the temporal artery, as in Rana and Bufo.
R. dorsalis runs dorsad as in Rana, and supplies the skin of the back and of the dorsal surface of the head.
caudalis (Fig. 2). V. cava cranialis (V.cav.cr.) arises through the junction of the following vessels: v. jugularis externa (V.jug.ex.), v. jugularis interna (V.jug.int.), v. subscapularis (V.subsc.), v. cardinalis caudalis (V.card.caud.), and v. subclavia (V.subcl.).
Text Fig. 2. The principal vessels of the trunk seen from the ventral side. Left side of the drawing: the arrangement found in specimens Nos. 1 and 2. Right side: specimen No. 3. A.coel.m., a. coeliaco-mesenterica; A.occ.vert., a.occipito-vertebralis; Aor., aorta thoracica; V.card.caud., v.cardinalis caudalis; V.cav.caud., v. cava caudalis; V.cav.cr., v. cava cranialis; V.jug.ex., v. jugularis externa; V.jug.int., v. jugularis interna, V.subel., v. subclavia; V.subsc., v. subscapularis.
V. jugularis externa arises from the union of the lingual and faciomandibular veins. The tributaries of the faciomandibular vein are peculiarly arranged. This detail was not mentioned by the Stephensons. They unite in the neighbourhood of the mandibular joint. The principal tributaries are: v. mandibularis interna, v. facialis, v. infratympanica, and a rather strong vessel conducting the blood from the floor of the mouth.
V. mandibularis interna runs exactly as in other Salientians.
bone dorsally and reaches the palate, where it runs caudad on the internal margin of the maxillary. On the caudal margin of the palate, this vein [called v. facialis in spite of dubious homology (V.fac.)] is joined by a second vein from the palate, V. palatina (V.pal.). Then after a short course the facial opens into the faciomandibular vein.
Text Fig. 3. Veins on the palate, seen from the ventral side. Max., maxillare; V.fac., v. facialis; V.pal., v. palatina.
V. palatina conducts the blood from the palate in a manner not noticed in other Salientians. It arises under the medio-cranial region of the orbit by the union of two vessels: one running from the region of the choanae, the second from the lateral part of the palate. The palatine vein runs caudad, roughly parallel to the lateral margin of the parasphenoid, bends laterad, and in the region of the mandibular joint opens into the facial vein.
V. infratympanica is a slender vessel which runs ventrad from the internal jugular to the external jugular in the temporal region. A tributary of the tympanic vein is v. thymica.
From the above description it is obvious that the arrangement of veins in the palatine region in Leiopelma differs considerably from that found in the majority of Salientians. A similarity to this pattern is displayed only by Bombina, as in this animal the facial vein runs also on the internal surface of the maxillary (Szarski, 1948).
V. jugularis interna begins as in other Salientia in the angle of the skull formed by the cerebral box and os prooticum in the vicinity of R. hyomandibularis nervi facialis, as v. cerebralis media. In Leiopelma it is a very slender vessel conducting little blood and difficult to detect in sections. According to the Stephensons it receives a tributary from the palate. In my material I could not verify this point. The course of v. jugularis interna follows the normal Salientian pattern.
other Salientia. It drains the blood not only from the vertebral muscles but receives also a very strong tributary from the central nervous system. The last-named branch leaves the skull together with n. vagus. As the internal jugular is a slender vessel, the vertebral vein is in Leiopelma the principal route conducting the blood from the brain (V. cerebralis posterior).
V. vertebralis opened to the internal jugular in specimens Nos. 1 and 2 (left side of Fig. 2). In specimen No. 3 the arrangement of the veins differed, as the vertebral vein opened not into the internal jugular but into the postcardinal vein (Fig. 2, right side).
V. subscapularis and v. subclavia drain, as in other Salientia, the thoracic limb. The large cutaneous vein opens into v. subclavia similarly to all Salientians except Bombina, where two cutaneous veins exist, one opening into the subclavian and the other into the subscapular vein.
The large cutaneous vein in Leiopelma drains the blood from the skin of the trunk, but as in the majority of Salientia, it does not reach the head region.
In the thoracic limb only two transverse anastomoses were found. The first one runs on the upper arm directly under the skin, on the cranial margin of the leg, and connects v. branchialis with v. profunda brachii. The second anastomosis is formed by arcus venosus dorsalis manus in the region of the wrist.
As first stated by the Stephensons, in Leiopelma the postcardinals persist in the adult state. This feature is shown among Salientia also by Ascaphus, Bombina, Discoglossus and occasionally in Alytes (Howes, 1888). V. v. cardinales caudales (Fig. 2, V.card.caud.) begin in Leiopelma in a tangle of vessels, forming spacious sinuses between the kidneys. They run cranio-laterad, along the mesial borders of the kidneys, parallel to the thoracic aortae (Aor.) and open into the precavals (V.cav.cr.).
Also from the same venous sinuses arises the postcaval (V.cav. caud.) which is a very large vessel (diameter ca. 2·5 mm.) It follows the normal Salientian course.
Blood vessels in the pelvic limb were in all three specimens rather poorly injected. It is therefore difficult to go into a detailed description. The principal vessels were, however, clearly visible. They follow closely the arrangement found previously in Bombina (Fig. 4): v. femoralis dorsalis and v. ischiadica are present and are united by an anastomosis on the lateral side of the knee joint. V. femoralis ventralis and v. ilica transversa are absent. The description given by the Stephensons of this region is too general to be considered here.
It was impossible to ascertain the presence of the caudal vein.
form of three parallel vessels (spec. No. 2). This points to a great variability in the venous system, which can be considered as a primitive feature. A similar observation was made in Pipa (Klinckowström, 1894) and in several Caudata (Szarski, 1938).
Text Fig. 4. Principal veins on the thigh in Salientia (after Szarski, 1948). P., Pelobates; Bo., Bombina: R., Rana; Bu., Bufo. A.isch., a. ischiadica; V.fem.d., v. femoralis dorsalis; V.fem.v., v. femoralis ventralis; V.glut., v. glutea; V.isch., v. ischiadica.
This short description of the principal points in the arrangement of the blood vessels of Leiopelma indicates that although several traits of its vascular anatomy are evidently primitive, in general, however, a great similarity exists in the organisation of this primitive animal and the majority of Salientia. When considered in detail the blood vessel system of Leiopelma is nearest to that of Bombina. This fact indicates a great primitiveness of Discoglossidae in general. Similar results were also obtained by comparison of the cranial morphology of those Amphibians (Slabbert and Maree, 1945). The following points of vascular anatomy should be especially stressed as common both to Leiopelma and Bombina: the origin of the a. coeliaco-mesenterica, the persistence in the adult animal of v. v. cardinales caudales, the course of the facial vein, the course of the venous anastomosis in the upper arm, the arrangement of the veins in the thigh. All those features are probably primitive and therefore indicate a great antiquity of Leiopelma and Bombina.
Very important, also, is the fact that the structure of the great entaneous artery in Leiopelma is closely similar to that found in higher Salientia. It suggests that the presence and characteristic anatomical relations of this vessel are a very ancient trait of Salientia. Cutaneous respiration was evidently developed long before Salientia began to split up into the groups living at present. Poor development of the great cutaneous artery which characterises the Pipidae must be regarded as a result of secondary adaptation to the watery habitat.
cavity, namely v. cerebralis anterior, media and posterior. In all Salientias so far dissected v. cerebralis media remains the principal vessel of the brain. In Xenopus, v. cerebralis posterior persists in the adult state, but as a rudiment (Millard, 1949). In Leiopelma it is the principal vessel.
Recently the vascular anatomy of Xenopus was an object of detailed study (Millard, 1941, 1942, 1945, 1949; Paterson, 1939, 1942). When compared with Leiopelma and Bombina it is striking how few points were found in Xenopus which could be considered as primitive, and how many are peculiar to this animal only, and are evidently extreme adaptations to life in water. It seems, therefore, that the present systematics of the lower Salientia, founded by Noble (1924, 1931)—(i.e., dividing those animals into two suborders: Amphicoela—including only one family, Leiopelmidae, and Opisthocoela—including two families, Discoglossidae and Pipidae)—cannot receive support from the angiological point of view. The Discoglossidae seem to be more closely related to the Leiopelmidae than to the Pipidae.
The arrangement of the principal arteries and veins was examined in three female specimens of Leiopelma hochstetteri Fitz. The principal findings are the strong development of the large cutaneous artery, the presence of postcardinals in adult specimens, the peculiar mode of origin of the facial and faciomandibular veins, the fact that the greater part of the blood from the brain leaves the skull through the vagus foramen and flows into the vertebral vein, and, finally, the presence in the thigh of v. ischiadica and v. femoralis dorsalis.
These features, compared with the vascular anatomy of the other Salientia, suggest that: (1) Cutaneous respiration is a very ancient property of Salientia; (2) the Leiopelmidae and Discoglossidae are closely related; (3) the Pipidae is not a primitive group, but one secondarily adapted to life in water.
I am deeply obliged to Mr. Turbott and Professor Richardson for their kindness in providing me with material for this work, and also to Professor Wodzicki, who was so kind as to arrange the consignment of preserved animals to Poland.
Archey, G., 1922. The habitat and life history of Liopelma hochstetteri. Rec. Canterbury Mus., 2, pp. 59–71.
Bhaduri, I. L., 1930. Notes on the arterial system of the common Indian toad, Bufo melanosticus Schneid. Journ. Proc. Asiatic Soc., 26, pp. 301–315.
——, I. L., 1931. Observations on the course of the facial vein and the formation of the external jugular vein in some Indian frogs and toads. Journ. Proc. Asiatic Soc., 27, pp. 101–110.
——, I. L., 1938. Observation on the course of the facial vein and the formation of the external jugular vein in an American bullfrog, Rana catesbeiana. Anat. Anz., 86, pp. 170–172.
——, I. L., and Ghose, K. C., 1943. Notes on the lumbar veins in the common Indian toad, Bufo melanosticus Schneider. Journ. R. Asiatic Soc., 9, pp. 55–62.
de Villiers, C. G. S., 1934a. Studies on the cranial anatomy of Asoaphus truei Stjnr., the American “Liopelmid.” Bull. Mus. Comp. Zool., Harvard, 77, pp. 7–38.
——, C. G. S., 1934b. On the morphology of the epipubis, the Nobelian bones and the phallic organ of Ascaphus truei Steineger. Anat. Anz., 77, pp. 23–47.
de Vos, C. M., 1938–39a. The inscriptional ribs of Liopelma and their bearing upon the problem of abdominal ribs in Vertebrata. Anat. Anz., 87, pp. 82–101.
——, C. M., 1938–39b. The zonal and sternal skeleton of the Liopelmidae (Anura). Ibidem, pp. 54–81.
Howes, G. B., 1888. On the azygos vein in the anurous Amphibia. Proc. Zool. Soc. London, p. 122.
Klinckowström, A. v., 1894. Zur Anatomie der Pipa americana. III. Gefässsystem und subcutane Lymphsäcke. Zool. Jahrb. Abt. Ont., 7, pp. 647–666.
Millard, N., 1941. The vascular anatomy of Xenopus laevis (Daudin). Trans. R. Soc. South Afr., 28, pp. 387–439.
——, N., 1942. Abnormalities and variations in the vascular system of Xenopus laevis (Daudin). Trans. R. Soc. South Afr., 29, pp. 9–28.
——, N., 1945. The development of the arterial system of Xenopus laevis, including experiments on the destruction of the larval aortic arches. Trans. R. Soc. South Afr., 30, pp. 217–234.
——, N., The development of the venous system of Xenopus laevis. Trans. R. Soc. South Afr., 32, pp. 55–99.
Noble, G. K., 1922. The phylogeny of the Salientia. I. The osteology and the thigh musculature, their bearing on classification and phylogeny. Bull. Amer. Mus. Nat. Hist., 46, pp. 1–87.
——, G. K., 1931. The biology of the Amphibia. New York and London.
——, G. K., and Putnam, P. G., 1931. Observations on the life history of Ascaphus truei Stejneger. Copeia, 1931, pp. 97–101.
Paterson, N. F., 1939. The head of Xenopus laevis. Quart. J. Mior. Sci., 81, pp. 161–234.
——, N. F., 1942. The anterior blood-vessels of Xenopus laevis. S. Afr. J. Sci., 38, pp. 279–291.
Slabbert, G. K., and Maree, W. A., 1945. The cranial morphology of the Discoglossidae and its bearing upon the phylogeny of the primitive Anura. Ann. Univ. Stellenbosch, 23, pp. 91–97.
Stephenson, E. M. and N. G., 1947. On the circulatory system of Leiopelma hochstetteri with particular reference to the posterior cardinal veins and to the blood-vessels of the kidneys. Trans. R. Soc. N.Z., 76, pp. 492–503.
Szarski, H., 1937. The blood vessels of the thymus gland in some of the Salientia. Bull. Int. Acad. Pol. Sci., B II, 1937, pp. 139–149.
——, H., 1939. The blood vessels of the thymus gland in some of the Urodela. Bull. Int. Acad. Pol. Sci., B II, 1938, pp. 305–315.
——, H., 1948. On the blood-vascular system of the Salientia. Bull. Int. Acad. Pol. Sci., B II, 1947, pp. 145–211.
Turbott, E. G., 1942. The distribution of the genus Leiopelma in New Zealand with a description of a new species. Trans. Roy. Soc. N.Z., 71, pp. 247–253.
van Gelderen, Chr., 1924. Die Morphologie der Sinus durae matris. I. Die vergleichende Ontogenie der neurokraniellen Venen der Anamnien und Reptilien. Ztschr. Anat. Entw., 73, pp. 541–605.
——, 1933. Venensystem, mit einem Anhang über den Dotterund Plazentarkreislauf. Handb. Vergl. Anat. Wirbelt., 6, pp. 685–744. Berlin und Wien.
Wagner, D. S., 1934a. Liopelma studies. I. The structure of the inner ear in relation to the reduction of the middle ear in the Liopelmidae (Noble). Anat. Anz., 79, pp. 20–36.
——, D. S., 1934b. Liopelma studies. II. On the cranial characters of Liopelma hochstetteri. Anat. Anz., 79, pp. 65–77.
James Park was born at Thanestone Hall in the Valley of the Don in the year 1857. His mother was a niece of Mountstuart Elphinstone, Governor of Bombay in the John Company days. We know very little of his youth except that he studied under Sir Andrew Ramsay, who was Professor of Geology at the Imperial College, London, and also Director of the Geological Survey of Great Britain. He can, however, have remained at his studies for not more than a year or so, but in this short time he acquired a passionate liking for geology. When, at the age of seventeen, he sailed for New Zealand he could not have dreamed that he was destined to play a pioneer role in working out the geology of that young Dominion. He actually left with his sister, who was sailing for Wellington to join her husband, an Army officer, but shortly after their arrival in New Zealand her husband was transferred to Gilbraltar and James Park was left in New Zealand alone.
He started work as a cadet on a sheep station near Castlepoint, but before doing so he presented to Dr. Hector, at the Colonial Museum, a letter of introduction from Sir Andrew Ramsay. The East Coast of the North Island was sparsely settled in those days and roads were non-existent. The spirit of adventure took him on long riding journeys and he became an inveterate huntsman after the wild cattle and pigs in which that country abounded: experience which was later to stand him in good stead on his pioneering expeditions in the King Country and the Southern Alpine regions.
In those days, however, the price of wool fell so low that Park could see no future in sheep farming and in 1878 he returned to Wellington, where he obtained a junior position in the Geological Survey. His first geological expeditions were with Alexander McKay in the Nelson Province, followed, in 1879, by a geological and botanical expedition with McKay and Buchanan in the region extending from Lake Ohai to Hawea and Wanaka, with excursions to the sources of the Hopkins and the Matukituki.
Park also came to know Sir George Grey intimately, for, during sessions of Parliament, Sir George used to wander over to the Museum to inquire the fate of his cherished copper lode in Kawau Island.
I remember they were fancy—for I threw a stone to try 'em.
The first ascent of Mount Franklin was made by Park, and he later succesfully traversed the Mount Arthur Range, including the ascent of the summit—Double Peaks.
It was not long before the tranquil atmosphere of the drafting office was too much for him, and in 1885 he rejoined the Geological Survey, working again with his cabin-mate, Cox, until the latter was appointed successor to Sir William LeNeve Foster as Professor of Mining at the Royal School of Mines.
In succeeding years he was engaged on surveys in Taranaki (where he was able, for the first time, to place the succession of our Tertiary rocks on a sound basis), in the Collingwood area, and in the region of Big Bay and the Dart River on our West Coast. In 1886 and 1887 he conducted almost the first explorations in the King Country, which was in those days a refuge for disaffected natives and renegade pakehas, difficult of access and separated from the coastal areas by deeply dissected forest-clad ranges. He made the first ascent of Mount Ruapehu on January 8, 1885: the official narrative of the ascent is published in volume 19 of our Transactions.
The following year saw him in the inaccessible Red Hill country of South Westland, which he reached from Glenorchy, ascending Mount Cosmos on the way, and then again he spent a summer in his beloved mountains of western Nelson. He did, in fact, write more than thirty official reports on many phases of geology for the Geological Survey.
In 1889, after fifteen years spent in the exploratory work he so loved, and at the age of thirty-two, he was appointed Director of the Thames School of Mines at a time when the Hauraki goldfield had developed into one of the world's more important centres of gold-mining. This was a turning point in Park's career, because, although he retained his love for the mountains and returned to them whenever he could, he transferred his main interests to mining and mining geology and, later, to academic work.
For a time he became Consultant to a financial organization with mining interests on the Hauraki goldfields, and in 1901 he accepted the Chair of Mining at Otago University, which had been rendered vacant by the accidental death of Professor Ulrich.
Many men who were later to become famous passed through Park's hands. They include that group of mining engineers who were associated with Herbert Hoover (later President of the United States) in the Western Australian goldfields—Malcolm Maclaren, who became the world's leading mining geologist; John Agnew, who became the world's leading gold financier; G. W. Thomson, who became General Manager of the rich Ashanti mines; and several others.
Park already had a very wide knowledge of the geology of New Zealand and he did not allow this to stagnate after his appointment to Otago. During the years of his professorship he wrote five large memoirs for the Geological Survey, including three on Central Otago—the scene of so much successful alluvial gold mining. But the one which we in Dunedin know best is that dealing with the Oamaru District, which is still fundamentally correct.
in some measure marks the close of a chapter, since the specialized work of succeeding decades, particularly in palaeontology, petrology and geomorphology naturally has called for some modification of the stratigraphical classifications and certain other conclusions of our great pioneer geologists. His writings were not, however, confined to official reports and text books. He was a contributor to many geological and some mining engineering papers and technical journals. The full list of his varied writings would contain about a hundred titles.
He found time to go abroad, and travelled widely in the Western Australian goldfields, in Tasmania, and on the Continent, and he was engaged as a consultant in countries as far removed as New Caledonia and Spain. During the first world war, he reported on nickel, chrome, wolfram and molybdenite mines for the Allies in the Pacific region.
Park retired at the age of seventy-five in 1931 and was appointed Emeritus Professor of Otago University. He had brought to the University a wealth of experience as an explorer, a fundamental knowledge of geology gained from Hector, McKay, and Cox, a knowledge of mining and mining geology from the Hauraki goldfields, and, above all, a knowledge of men and their ways. He belonged to the old school before the days of specialization and had an exceptional range of interests and an exceptional capacity for work.
He served as President of the Otago Institute, and for many years was its representative on the Board of Governors of the New Zealand Institute. For fifteen years he was President of the Otago University Rugby Football Club, and he was also President of the New Zealand Society of Mining Engineers. He was a Fellow of the Geological Society, an Honorary Member of the Geological Society of Berlin, and an Honorary Member of the Institution of Mining and Metallurgy (London).
His retentive memory, his sense of humour, and his never failing optimism made him a delightful conversationalist and an agreeable companion. He loved to entertain his students (and this I might say he did on a most lavish scale) and recount to them the stories of his exploring days; he kept young by his associations with the younger generation. He had a large family and his youngest son later became famous—he is Air Marshal Sir Keith Park, who controlled the Battle of Britain and then became the air defender of Malta, and later the Allied Air-Commander in Chief, South-East Asia Command.
Park died at Oamaru in 1947 at the age of ninety, shortly after he had been visited by Sir Keith and Lady Park. His life of exceptional fullness and usefulness was crowned by the visit of his famous son, the anticipation of which had sustained him through the last months of illness.
Professor Park's portrait hangs in the Scottish National Gallery among those of other distinguished Scotsmen, and a photograph of this portrait is published in this volume.
Dr. Patrick Marshall was for over forty years an outstanding figure among New Zealand scientists, and was well known to geologists in many lands as a very versatile and productive investigator. Born in 1869, he was the son of the Rev. J. H. Marshall, M.A., of Sapiston, Suffolk, who, chiefly for reasons of health, brought his family to New Zealand in 1876, and settled at Kaiteriteri in the Nelson District. He died, however, in 1878, and his widow and family went back to England, where Patrick Marshall entered school in Bury St. Edmunds. In 1881 his family returned to New Zealand and resided at Wanganui, and in the Collegiate School there Patrick Marshall completed his secondary education. He entered Canterbury University College in 1889 and in 1892 gained the B.A. and B.Sc. degrees with the Senior Scholarship in Geology which he had studied under Professor F. W. Hutton, F.R.S. In the following year he completed with high honours the M.A. course in Geology, working at the University of Otago under Professor G. A. F. Ulrich, completing his first research, a study of the Tridymite Trachyte of Lyttelton, which was published in 1894.
In 1896 he became Science Master at the Grammar School, Auckland, and resuming his interests in geological research, he studied the volcanic rocks of that region, completing a thesis, the majority of which is still unpublished, for which he was granted the D.Sc. degree.
the University of New Zealand, of the Senate of which he was for some years a member. His list of publications during the period contains over fifty titles. They included a book on the Geography of New Zealand (1905, revised 1911), the Geology of New Zealand (1912), and the portions of the “Handbuch der Regionalen Geologie” dealing with New Zealand and the adjacent Islands, and with Oceania (1912). He was extremely active in research. His accounts of the Geology of the Dunedin District (1906) and “The Sequence of Lavas at North Head, Otago Harbour” (1914), which involved a great amount of field work, and petrographical and chemical study, are among the most notable of his many papers. With them there are also to be recalled many other papers on the igneous rocks and other features of New Zealand geology in both the South and North Islands. His petrographic interests were extended to deal with the volcanic rocks of the south-western Pacific, and on this ground of mutual interest he entered into frequent correspondence and later personal association with Professor A. Lacroix, and was in 1938 elected a Correspondent de l'Academie des Sciences Coloniales. His active membership in what is now the Australian and New Zealand Association for the Advancement of Science gave him occasion to discuss before it the distribution of the igneous rocks in New Zealand (1907), Ocean Contours and Earth Movements in the South-West Pacific (1909), and his Presidential Address to the Geological Section on the structural boundaries of the south-western Pacific (1911) which were shown to be related to the line separating the regions wherein andesitic lavas occur from those wherein there are basic alkaline lavas. This concept was crystallised in his use of the term “the andesitic line” for the structural boundary of the western half of the Pacific basin in his account of the Geology of Oceania (1912), a term which has come into very general use, though an alternative term, “the Marshall line” has also been used with the same significance. The many problems, geophysical, geological, and biological arising from a consideration of the natural history of the Pacific were often in Dr. Marshall's mind, and formed the subjects of his Presidential Address to the Geographical Section of the Australian and New Zealand Association for the Advancement of Science in 1932, and that given by him as President of the whole Association in 1946.
The preparation of his books on the Geology of New Zealand must have brought very vividly before him the unsatisfactory and to some extent contradictory conceptions regarding the stratigraphy of New Zealand during the opening decade of this century, and he devoted much effort towards the study of the sedimentary succession and molluscan faunas of the Tertiary and Cretaceous rocks, on which he wrote a number of papers, several of them in collaboration with Mr. R. Murdoch. The most important of these papers was his elaborate study of the Cretaceous ammonites of New Zealand (1926), in part written by him while in the British Museum of Natural History. In this paper the Indo-Pacific affinities of the New Zealand forms are discussed. In connection with the Geological Survey he wrote the portions of the Dun Mountain Bulletin (No. 12, published 1912) dealing with Mesozoic stratigraphy and igneous rocks, also the Tuapeka Bulletin (No. 19, published 1918).
Leaving the University of Otago in 1917, he became Headmaster of his old school, Wanganui College, and retiring from this after several years of service, he devoted himself for a time to geological research in the Pacific Islands and elsewhere, dealing with their petrology and the features of coral reefs. In 1924 he was appointed Geologist and Petrologist to the Department of Public Works, where in addition to his general consultative work, he carried out several major lines of research resulting in important publications, a study of special local interest on the building stones of New Zealand (1929) and two of more widespread theoretical importance. In his investigation of the Wearing of Beach Gravels and Beach Gravels and Sands (1928, 9), carried out both in the field and experimentally, he considered the change in the size and form of the pebbles and the amount and nature of the fine-grained or even colloidal material produced during the processes of attrition, impact and grinding, and in so doing threw much light on the conditions of origin of littoral and off-shore sediments. He also made (1935) elaborate studies of the rocks of rhyolitic composition which are widespread in the centre of the North Island of New Zealand and were originally though to be flows and tuffs. He concluded that they were largely composed of particles which had been explosively erupted and had emitted incandescent gases until they had become on cooling agglutinated into coherent rock-masses often showing marked columnar jointing. This mode of origin is comparable with that of the material derived from nuées ardentes of Katmaian cruptions. The occurrence of rocks of like origin is becoming recognised in regions around the Pacific, and the term “ignimbrite” suggested for them by Marshall is tending to replace the term “welded tuffs” which was often assigned to them.
In later years Dr. Marshall was greatly interested in the occurrence of orbicular granites in New Zealand, and gave a number of excellent polished specimens of these to geological museums, but published little thereon. He was active in the study of zeolitic minerals, believed by him to be of primary origin, occurring in volcanic rocks, especially in more or less alkaline lavas, and spent much time investigating various methods of recognising the presence and determining the nature of such minerals by their diagnostic reactions with various solutions principally of silver nitrate. His latest paper (1946), which gave a short account of such studies, was said to be the precursor of a more detailed study then in preparation, which unfortunately was never completed.
Dr. Marshall's activities in connection with the Australian and New Zealand Association for the Advancement of Science, his presence at the meetings of the Pacific Science Congress in a number of lands, Japan, Java, and California as well as in Australia and New Zealand, and his presence at two European meetings of the International Geological Conference, as well as his many writings, made him well known to geologists in many parts of the world. His chief services to scientific societies were, however, given to the Royal Society of New Zealand, of which he was President in 1925–6, and from which he received the Hutton and Hector Memorial Medals. As an active member of its Executive Committee for many years he exercised much influence on its policy.
The latest of the honours accorded to him in recognition of his long life of varied service to science was the Honorary Doctorate of Science conferred on him by the University of New Zealand in 1948, nearly fifty years after he had received the degree by examination on the grounds of his first major research in Geology. His interest in research was maintained to the last. In a letter to the writer sent in October, 1950, he referred to the interesting carbonate-bearing magnesian rocks near Milford Sound, which he had described in 1904, regretting that he was unable to return to the field and laboratory investigations of their problematical origin. But he passed away early in November in the eighty-second year of his age.

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