NEW MARINE ALGAE FROM SOUTHERN CALIFORNIA. II

FURTHER STIJDY of the marine plants of Soutlhern California (cf. Hollenberg, 1940, 1943) brings to light additional plants wlich seem not to lhave been previously reported. Several of these are described herewith. Griffithsia multiramosa (Setchlell and Gardner) T'aylor, (Neomonospora multiramosa Setchlell and Gardner, 1937) var. balboensis, var. nov. (fig. 1). Plantae rosaceorubrae aut lucidae rubra, cristas delicatas et globosas et 10-15 cm. crassis formnantes, fere epiplhyticae, implicatae et dense ramnosae; ramis multo dichlotomo ramosis; 150-170 t crassis deorsum et gradati'm angustioribus sursum ad 30 t aut minus; segmnentis fere 10-18 diametros longis, et minus ad apicem ramorum, leviter tumidis; tetrasporangiis sparsis, globosis et 60-70 t crassis, tetralhedralibus divisis, sine ramis involucralibus, singulatim per pediculum fere unicellulare affixis; cystocarpiis et raimiis antlheri(lialibus ignotis. Plants rose-red to deep red in color, forming delicate globular tufts mostly 10-15 cm. in diameter, epiplhytic or often unattaclhed, intricately and densely branclhed; branclhes repeatedly dichlotomous at a very narrow angle except in lower parts, 150-170 t in diameter and witlh relatively tlhick walls below and gradually narrower above to 30 t or less, witlh tlhin walls; segments mostly 10-18 diameters long and shlorter toward the tips of the branclhes, only slightly tumid; tetrasporangia infrequent, globular and 60-70 t in diameter, tetrahedrally divided, witlhout involucral branches, attaclhed singly mostly at non-forking nodes by a short pedicel of one or two cells, so that a tetrasporangial branclh forms one branclh of a dichotomy; sexual plants unknown; plants occurring in sheltered water of inland bays. The type specimen of this plant is number 2364, tetrasporic, collected by the writer, September 24, 1938, near the bridge of State Highway No. 101, where the upper bay connects witlh the harbor proper at Balboa, Orange County, California. It has been repeatedly collected at this place where it is sometimnes very abundant and either floating free in the tidal current or attached insecurely to various objects. This plant has been collected by various investigators a number of times at different places in Southern California over a period of many years, but is rarely found in fruit. The scarcity of reproductive structures may bear some relation to the seeming readiness witlh wlichl the plant propagates vegetatively. Rhizoids arise witlh considerable frequency from the branclhes and the writer is inclined to believe that fragmentation followed by ready formation of rhizoids results in vegetative propagation, although no experiments have been performed in this conneetion. 1 Received for publication May 10, 1945. G. multiramosa var. balboensis is very close to G. multiramosa var. minor described by Taylor (1939) from Baja California, Mexico. The local plant is muclh larger and differs in its more globular form and frequently free-floating lhabit, and especially in labitat, since it seems to be confined to the warm water of slheltered bays and lagoons. From the species as described by Setchlell and Gardner ( 1937) the plant differs in the tetralhedral division of the sporangia and in lhabit and lhabitat. It also seems close to G. arachnoidea described by C. Agardlh (1828) from the coast of "Gallea" and figured by B0rgesen (1930). Judging by Agardlh's description, and by the figures and description of B0rgesen, the California plant differs in the more globular form and less tumid cells. I"lants collected by B0rgesen were from exposed positions. Soutlhern California plants seem to be decidedly limited to warm, slheltered bays. CHONDRIA arcuata sp. nov. (fig. 2-i) Frondes pullo rubrae et cristatae, cum rainis prostratis et repentibus per intervalla frequentia per lhapteres breves et robustos ad saxa affixis et cum ramis erectis 3-4 cm. altis et 300-400-(700) t crassis; ramnis perspicue arcuatis, ad fundainentum attenuatis et fere cum rainulis paucis et similiter arcuatis; ramis manifeste polysiplhonis, cum quinque cellulis pericentralibus comnparate magnis, longitudine aequali; segmnentis axis pericentralibus fere 1-1.5 diametros longis; cortice tenui circiter stratorum duorum cellularum 20-25 t crassis et 1.0-1.5-(4) diamnetros longarum constructo; apicibus crescentibus in puteis in apicibus ramorumn truncatorum positis, et cristam trichloblastarumn breviumn et dense furcatarum ferentibus; tetrasporangiis in apicibus ramorumn sitis, 8090 t crassis, tripartitis; cystocarpiis ovoidis et sessilibus, circiter 360-450 t crassis, sine calcaribus in basi; ramnulis antlheridialibus orbicularibus numerosis ad apices ramorum, 180-215 j latis. Fronds dull red, tufted, witlh prostrate creeping branclhes attaclhed to rocks by slhort sturdy lhapteres at frequent intervals and erect terete branclhes 3-4 cm. hiiglh and 300-400-(700) t in diameter; branclhes conspicuously arcuate, attenuate at the base and mostly witlh few or no branclhlets, the branclhlets being simnilarly curved; branches conspicuously polysiplionous internally, witlh five relatively large pericentral cells of uniform lengtlh slhowing plainly tlhrouglh the relatively tlhin cortex and giving an evidently segmented appearance to the brancles witlh respect to the inner core; segments of the pericentral axis cotnposing more than lhalf of the widtlh of the branches and 1.0-1.5 diameters long; cortex mostly of 2-3 layers of cells 20-25 t in diameter and 1.01.5-(4.0) diameters long; clhromnatoplhores in the form of long, contorted bands; growing point of