Page:Walcott Cambrian Geology and Paleontology II.djvu/13

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ILLUSTRATIONS
ix
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