# Cambrian Geology and Paleontology/Volume 1

Smithsonian Miscellaneous Collections 53
SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 53
CAMBRIAN GEOLOGY AND PALEONTOLOGY
I
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 1949)
CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION 1910
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The present series, entitled "Smithsonian Miscellaneous Collections," is intended to embrace the principal publications issued directly by the Smithsonian Institution in octavo form; those in quarto constituting the "Smithsonian Contributions to Knowledge." The quarto series includes memoirs, embracing the records of extended original investigations and researches, resulting in what are believed to be new truths, and constituting positive additions to the sum of human knowledge. The octavo series is designed to contain reports on the present state of our knowledge of particular branches of science; instructions for collecting and digesting facts and materials for research; lists and synopses of species of the organic and inorganic world; reports of explorations; aids to bibliographical investigations, etc., generally prepared at the express request of the Institution, and at its expense.
In the Smithsonian Contributions to Knowledge, as well as in the present series, each article bears a distinct number, and is also separately paged unless the entire volume relates to one subject. The actual date of the publication of each article is that given on its special title-page, and not that of the volume in which it is placed. In many cases papers have been published and largely distributed, several months before their combination into volumes.
* CHAS. D. WALCOTT, Secretary of the Smithsonian Institution
TABLE OF CONTENTS
| Number 1 | (Publication 1804). Nomenclature of Some Cambrian Cordilleran Formations. 1908. Pp. [Title] + 1-12. Published April 18, 1908. |
| Number 2 | (Publication 1805). Cambrian Trilobites. 1908. Pp. [2] + 13-52, Pls. 1-6. Published April 25, 1908. |
| Number 3 | (Publication 1810). Cambrian Brachiopoda: Descriptions of New Genera and Species. With index. 1908. Pp. [Title] + 53-137, Pls. 7-10. Published October 1, 1908. |
| Number 4 | (Publication 1811). Classification and Terminology of the Cambrian Brachiopoda. 1908. Pp. [Title] + 139-165, Pls. 11, 12. Published October 13, 1908. |
| Number 5 | (Publication 1812). Cambrian Sections of the Cordilleran Area. With index. 1908. Pp. [Title] + 167-230, Pls. 13-22. Published December 10, 1908. |
| Number 6 | (Publication 1934). Olenellus and Other Genera of the Mesonacidæ. With unpaged index. 1910. Pp. [Title] + 231-422, Pls. 23-44. Published August 12, 1910. |
| Number 7 | (Publication 1939). Pre-Cambrian Rocks of the Bow River Valley, Alberta, Canada. 1910. Pp. [Title] + 423-431, Pls. 45-47. Published August, 1910. |
| | Index. Pp. 433-497. |
ILLUSTRATIONS
PLATES
TO FACE PAGE :
| 1. | Cambrian Trilobites (Bathyuriscus, Albertella, Burlingia, Oryctocara) | 42 |
| 2. | Cambrian Trilobites (Albertella) | 44 |
| 3. | "" (Zacanthoides) | 46 |
| 4. | "" (Neolenus) | 48 |
| 5. | "" (Neolenus) | 50 |
| 6. | "" (Neolenus) | 52 |
| 7. | Cambrian Brachiopoda (Atremata) | 118 |
| 8. | "" (Atremata and Neotremata) | 120 |
| 9. | "" (Neotremata and Protremata) | 122 |
| 10. | "" (Protremata) | 124 |
| 11. | Schematic Diagram of evolution of Cambrian Brachiopoda | 140 |
| 12. | Microphotographs of brachiopod shell sections | 164 |
| 13. | Map of House Range, Millard County, Utah | 172 |
| 14. | West face of Notch Peak, House Range, Utah | 173 |
| 15. | Fig. 1. Eastern side of the House Range south of Marjum Pass, Utah | 178 |
| | Fig. 2. Ridge east and southeast of Antelope Springs, House Range, Utah | 178 |
| 16. | North side of Dome Canyon, House Range, Utah | 182 |
| 17. | West face of House Range beneath Tatow Knob, Utah | 184 |
| 18. | Lower Cambrian quartzites, Inyo County, California | 186 |
| 19. | Eastern side of Sherbrooke Ridge, British Columbia | 207 |
| 20. | Fig. 1. North Ridge of Castle Mountain, Alberta | 209 |
| | Fig. 2. Southeast front of Castle Mountain, Alberta | 209 |
| 21. | Mount Stephen, British Columbia, from the north | 210 |
| 22. | Ridges southeast and west of Lake Louise, Alberta | 216 |
| 23. | Cambrian Trilobites (Nevadia) | 380 |
| 24. | "" (Elliptocephala, Olenellus?, Pæpdeumias) | 382 |
| 25. | Cambrian Trilobites (Elliptocephala, Pædeumias) | 384 |
| 26. | "" (Mesonacis) | 386 |
| 27. | "" (Callavia, Holmia) | 388 |
| 28. | "" (Callavia) | 390 |
TO FACE PAGE :
| 29. | Cambrian Trilobites (Holmia) | 392 |
| 30. | "" (Wanneria) | 394 |
| 31. | "" (Wanneria) | 396 |
| 32. | "" (Pædeumias) | 398 |
| 33. | "" (Pædeumias) | 400 |
| 34. | "" (Pædeumias, Olenellus) | 402 |
| 35. | "" (Olenellus) | 404 |
| 36. | "" (Olenellus) | 406 |
| 37. | "" (Olenellus) | 408 |
| 38. | "" (Olenellus, Callavia, Wanneria) | 410 |
| 39. | "" (Olenellus) | 412 |
| 40. | "" (Olenellus, Olenelloides, Holmia, Peachella) | 414 |
| 41. | Cambrian Trilobites (Olenellus, Pædeumias, Callavia) | 416 |
| 42. | "" (Callavia) | 418 |
| 43. | Eyes of Limulus and Olenellus | 420 |
| 44. | Genera of Mesonacidæ, showing lines of descent | 422 |
| 45. | Fig. 1. Panoramic view of Bow Valley from near Laggan, Alberta | 424 |
| | Fig. 2. Fort Mountain from the west side of Corral Creek, Alberta | 424 |
| 46. | Fig. 1. Ridge southeast of Ptarmigan Lake, Alberta | 425 |
| | Fig. 2. Panoramic view from the south slope of Fort Mountain, Alberta | 426 |
| 47. | Map of a portion of Bow Valley showing approximate area of pre-Cambrian strata | 428 |
FIGURES
| 01. | Diagram illustrating known distribution of families in Cambrian strata | 140 |
| 2. | Tangential section of Billingsella plicatella, x 200 | 151 |
| 3. | Tangential section of Dalmanella subequata, x 35 | 151 |
| 4. | Tangential section of Kutorgina cingulata, x 200 | 151 |
| 5. | Tangential section of Obolus apollinis, x 200 | 151 |
| 6. | Vertical section of strata in House Range, Utah | 174 |
| 7. | Vertical section of strata in Blacksmith Fork Canyon, Utah | 190 |
| 8. | Vertical section of strata in Mount Bosworth, British Columbia | 206 |
| 9. | Vertical section of strata in Mount Bosworth, British Columbia | 207 |
TO FACE PAGE :
| 10. | Paradoxides sp. | 255 |
| 11. | Paradoxides sp. | 255 |
| 12. | Olenellus (Holmia) bröggeri Shimer | 255 |
| 13. | Paradoxides harlani | 255 |
| 14. | Nevadia wecksi | 257 |
| 15. | Nevadia wecksi | 257 |
| 16. | Mesonacis mickwitzi | 263 |
| 17. | Mesonacis mickwitzi | 263 |
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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