Cambrian Geology and Paleontology/Volume 1

by Charles Doolittle Walcott

SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOLUME 53

CAMBRIAN
GEOLOGY AND PALEONTOLOGY

I

BY
CHARLES D. WALCOTT

Smithsonian Institution Logo (1910)

"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

ADVERTISEMENT

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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

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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

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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