# Cambrian Geology and Paleontology/Volume 2

Smithsonian Miscellaneous Collections 57
SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 57
CAMBRIAN GEOLOGY AND PALEONTOLOGY
II
BY CHARLES D. WALCOTT
"EVERY MAN IS A VALUABLE MEMBER OF SOCIETY WHO, BY HIS OBSERVATIONS, RESEARCHES, AND EXPERIMENTS, PROCURES KNOWLEDGE FOR MEN" — SMITHSON
(Publication 2270)
CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION 1914
The Lord Baltimore Press BALTIMORE, MD., U. S. A.
ADVERTISEMENT
The present series, entitled "Smithsonian Miscellaneous Collections," is intended to embrace all the octavo publications of the Institution, except the Annual Report. Its scope is not limited, and the volumes thus far issued relate to nearly every branch of science. Among these various subjects zoölogy, bibliography, mineralogy, and anthropology have predominated.
The Institution also publishes a quarto series entitled "Smithsonian Contributions to Knowledge." It consists of memoirs based on extended original investigations, which have resulted in important additions to knowledge.
* CHARLES D. WALCOTT, Secretary of the Smithsonian Institution.
CONTENTS
| | | PAGE |
| 1. | Walcott, Charles D. Abrupt appearance of the Cambrian Fauna on the North American Continent | 1 |
| | Published August 18, 1910. Pp. [Title] + 1-16, pl. 1, text fig. 1. (Pub. No. 1940.) |
| 2. | Walcott, Charles D. Middle Cambrian Merostomata | 17 |
| | April 8, 1911. Pp. [Title] + 17-40, pls. 2-7. (Pub. No. 2009.) |
| 3. | Walcott, Charles D. Middle Cambrian Holothurians and Medusae | 41 |
| | June 13, 1911. Pp. [Title] + 41-68, pls. 8-13, text figs. 2-6. (Pub. No. 2011.) |
| 4. | Walcott, Charles D. Cambrian Faunas of China | 69 |
| | June 17, 1911. Pp. [Title] + 69-108, pls. 14-17, text figs. 7, 7a. (Pub. No. 2012.) |
| 5. | Walcott, Charles D. Middle Cambrian Annelids | 109 |
| | September 4, 1911. Pp. [Title] + 109-144, pls. 18-23. (Pub. No. 2014.) |
| 6. | Walcott, Charles D. Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata | 145 |
| | March 13, 1912. Pp. [Title] + 145-228, pls. 24-34, text figs. 8-10. (Pub. No. 2051.) |
| 7. | Walcott, Charles D. Cambro-Ordovician Boundary in British Columbia with Description of Fossils | 229 |
| | March 8, 1912. Pp. [Title] + 229-237, pl. 35. (Pub. No. 2075.) |
| 8. | Walcott, Charles D. The Sardinian Cambrian Genus Olenopsis in America | 239 |
| | March 8, 1912. Pp. [Title] + 239-249, pl. 36. (Pub. No. 2076.) |
| 9. | Walcott, Charles D. New York Potsdam-Hoyt Fauna | 251 |
| | September 14, 1912. Pp. [Title] + 251-304, pls. 37-49. (Pub. No. 2136.) |
| 10. | Walcott, Charles D. Group Terms for the Lower and Upper Cambrian Series of Formations | 305 |
| | September 16, 1912. Pp. [Title] + 305-307. (Pub. No. 2137.) |
| 11. | Walcott, Charles D. New Lower Cambrian Subfauna | 309 |
| | July 21, 1913. Pp. [Title] + 309-326, pls. 50-54. (Pub. No. 2185.) |
| 12. | Walcott, Charles D. Cambrian Formations of the Robson Peak District, British Columbia and Alberta, Canada | 327 |
| | July 24, 1913. Pp. [Title] + 327-343, pls. 55-59, text figs. 11, 12. (Pub. No. 2186.) |
| 13. | Walcott, Charles D. Dikelocephalus and other Genera of the Dikelocephalinæ | 345 |
| | April 4, 1914. Pp. [Title] + 345-412, pls. 60-70, text figs. 13-20. (Pub. No. 2187.) |
| | Index. Pp. 413-498. |
ILLUSTRATIONS
PLATES
TO FACE PAGE :
| 1. | Map showing distribution of pre-Cambrian Rocks | 4-5 |
| 2. | Middle Cambrian Merostomata (Sidneyia) | 30 |
| 3. | """ (Sidneyia) | 32 |
| 4. | """ (Sidneyia) | 34 |
| 5. | """ (Sidneyia and Amiella) | 36 |
| 6. | "" Trilobita and Merostomata (Neolenus and Sidneyia) | 38 |
| 7. | Cambrian and pre-Cambrian Merostomata (Sidneyia and Beltina) | 40 |
| 8. | Middle Cambrian Medusa and Holothurian (Peytoia and Eldonia) | 58 |
| 9. | Middle Cambrian Holothurians (Eldonia) | 60 |
| 10. | """ (Eldonia) | 62 |
| 11. | """ (Eldonia) | 64 |
| 12. | """ (Eldonia) | 66 |
| 13. | """ (Laggania, Mackenzia, and Louisella) | 68 |
| 14. | Cambrian Faunas of China (Micromitra (Paterina), Lingulella, Acrotreta, Orthotheca, Albertella, Stephanocare, Ptychoparia, Ptychoparia (Emmrichella), Crepicephalus, Pterocephalus, and Inouyia) | 102 |
| 15. | Cambrian Faunas of China (Agraulos, Lisania, Chuangia, Levisia, Anomocare, and Anomocarella) | 104 |
| 16. | Cambrian Faunas of China (Coosia, Asaphiscus, Bathyuriscus, and Solenopleura) | 106 |
| 17. | Cambrian Faunas of China (Anomocare, Anomocarella, and Levisia) | 108 |
| 18. | Middle Cambrian Annulata (Miskoia) | 134 |
| 19. | """ (Ottoia, Hyolithes, and Selkirkia) | 136 |
| 20. | Middle Cambrian Annulata (Pikaia and Oesia) | 138 |
| 21. | """ (Wiwaxia, Banffia, and Pollingeria | 140 |
| 22. | Middle Cambrian Annulata (Planolites, Worthenella, Amiskwia, and Ottoia) | 142 |
| 23. | Middle Cambrian Annulata (Canadia and Aysheaia) | 144 |
| 24. | Middle Cambrian Crustaceans (Neolenus, Ptychoparia, Mollisonia, and Tontoia) | 208 |
| 25. | Middle Cambrian Crustaceans (Marrella) | 210 |
| 26. | """ (Marrella) | 212 |
| 27. | Middle Cambrian Crustaceans (Burgessia, Waptia, and Opabinia) | 214 |
| 28. | Middle Cambrian Crustaceans (Opabinia, Nathorstia, and Naraoia) | 216 |
| 29. | Middle Cambrian Crustaceans. (Molaria, Habelia, and Yohoia) | 218 |
| 30. | Middle Cambrian Crustaceans (Bidentia, Emeraldella, and Burgessia) | 220 |
| 31. | Middle Cambrian Crustaceans (Hymenocaris and Leanchoilia) | 222 |
| 32. | Middle Cambrian Crustaceans (Hymenocaris, Fieldia, and Hurdia) | 224 |
| 33. | Middle Cambrian Crustaceans (Carnarvonia and Tuzoia) | 226 |
| 34. | """ (Hurdia, Odaraia, and Anomalocaris) | 228 |
| 35. | Brachiopods and Trilobites (Lingulella, Obolus, and Ceratopyge) | 236 |
| 36. | Trilobites (Olenopsis) | 248 |
| 37. | Cryptozoon proliferum Hall | 280 |
| 38. | Trail of Annelid (Climactichnites) | 282 |
| 39. | """ (Climactichnites) | 284 |
| 40. | """ (Climactichnites) | 286 |
| 41. | Potsdam-Hoyt Fauna (Lingulella, Triblidium, Pelagiella, and Matherella) | 288 |
| 42. | Potsdam-Hoyt Fauna (Matthevia) | 290 |
| 43. | """ (Palæacmæa, Hyolithellus, Hyolithes, Lonchocephalus, Agraulos, Ptychaspis, and Ptychoparia) | 292 |
| 44. | Potsdam-Hoyt Fauna (Dikelocephalus, Conokephalina, Pagodia, and Ptychoparia) | 294 |
| 45. | Legs of Trilobites (Neolenus serratus) | 296 |
| 46. | Tracks of Trilobites (Protichnites) | 298 |
| 47. | """ (Protichnites) | 300 |
| 48. | """ (Protichnites) | 302 |
| 49. | """ (Protichnites) | 304 |
| 50. | Brachiopoda (Lingulella and Mickwitzia) | 318 |
| 51. | " (Mickwitzia) | 320 |
| 52. | " (Mickwitzia and Obolella) | 322 |
| 53. | Trilobita (Callavia and Wanneria) | 324 |
| 54. | " (Holmia and Olenellus) | 326 |
| 55. | Fig. 1. Robson Peak District. (Panoramic view from Shio Point, looking down Moose River Valley) | 334-335 |
| | Fig. 2. Robson Peak District. (Panoramic view of Tah Peak, Mahto Mountain, and Calumet Creek) | 334-335 |
| 56. | Fig. 1. Robson Peak District. (Looking south across Calumet Creek and Flats) | 336-337 |
| | Fig. 2. Robson Peak District. (Looking southwest from south slope of Mahto Mountain) | 336-337 |
| 57. | Fig. 1. Robson Peak District. (View from south slope of Mahto Mountain) | 338-339 |
| | Fig. 2. Robson Peak District. (View from southwest slope of Titkana Peak, looking south) | 338-339 |
| 58. | Fig. 1. Robson Peak District. (Panoramic view of the Robson massif from the ridge south of Mumm Peak) | 340-341 |
| | Fig. 2. Robson Peak District. (Panoramic view of the Robson massif and adjoining mountains) | 340-341 |
| 59. | Figs. 1 and 2. Robson Peak District. (Panoramic view of Mural Glacier) | 342-343 |
| 60. | Dikelocephalus minnesotensis Owen | 392 |
| 61. | Dikelocephalinæ (Dikelocephalus and Saukia) | 394 |
| 62. | " (Dikelocephalus) | 396 |
| 63. | " (Dikelocephalus) | 398 |
| 64. | " (Dikelocephalus, Saukia, Calvinella, and Conokephalina) | 400 |
| 65. | Dikelocephalinæ (Saukia and Dikelocephalus) | 402 |
| 66. | " (Dikelocephalus and Saukia) | 404 |
| 67. | " (Saukia) | 406 |
| 68. | " (Conokephalina, Osceolia, and Calvinella) | 408 |
| 69. | " (Saukia) | 410 |
| 70. | " (Calvinella and Saukia) | 412 |
TEXT FIGURES
| Fig. | 01. | Theoretical profile of North American continent | 10 |
| | 2. | Diagrammatic reconstruction of imagined primitive Pelmatozoic ancestor | 43 |
| Fig. | 3. | Diagrammatic reconstruction of imagined Dipleurula ancestor | 43 |
| | 4. | Diagrammatic reconstruction of imagined primitive Holothurian type | 44 |
| | 5. | Eldonia ludwigi, new species | 47 |
| | 6. | Synaptula hyrdriformis (Lesseur) | 54 |
| Figs. 7, 7a. Levisia nasuta, new species | Figs. 7, 7a. Levisia nasuta, new species | Figs. 7, 7a. Levisia nasuta, new species | 87 |
| | 8. | Emeraldella brocki, new species | 204 |
| | 9. | Emeraldella micrura, new species | 205 |
| | 10. | Sidneyia inexpectans Walcott | 206 |
| | 11. | Near view of Tah Peak, Robson Peak District | 330 |
| | 12. | Robson Peak from northwest slope of Mahto Mountain | 331 |
| | 13-16. Saukia coloradoensis, new species | 13-16. Saukia coloradoensis, new species | 376 |
| | 17. | Saukia junia, new species | 378 |
| | 18-20. Saukia rustica, new species | 18-20. Saukia rustica, new species | 383 |
This work is in the public domain in the United States because it was published before January 1, 1929.
The longest-living author of this work died in 1927, so this work is in the public domain in countries and areas where the copyright term is the author's life plus 96 years or less. This work may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
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