Vlll ILLUSTRATIONS 



FACE PAGE 



13. Taenicepholtts shmnardi (Hall), Tostonia iole (Walcott), 



Utia curio Walcott, IVUbernia pero (Walcott), Xeno- 

 stegimn gonioccrcum (Meek), Isoteloides zvhitfieldi 

 (Raymond), Holtcria problematica (Walcott) 60 



14. Idahoia serapio Walcott, Kingstonia apion Walcott, Bynu- 



iiiia citinus Walcott, Ucehia ara Walcott, Platypeltis 

 croftii (McCoy), Tsinania cleora (Walcott), Illaenurus 

 quadratiis (Hall), Psilocephalns innotatus Salter, Moosia 



gmndis Walcott 60 



15. Cambrian trilobites 130 



16. Cambrian trilobites 132 



17. Cambrian trilobites 134 



18. Upper Cambrian trilobites 136 



19. Idahoia 138 



20. Briscoia 139 



21. Symphysiirina 140 



22. Kainella-Moxomia-Housia 142 



23. Bellefontia-Leiostegium-Moosia 143 



24. Ozarkian trilobites 144 



25. Diagrammatic map of areas of subsidiary troughs of Cor- 



dilleran Geosyncline in Paleozoic Pre-Devonian time. . . 147 



26. Outline map showing most of the sections 194 



27. Cliffs on Ghost River 260 



28. Cliffs on South Fork of Ghost River 260 



29. North side of Devils Gap 260 



30. Southwestern face of Sawback Range 264 



31. Fig. I. 



Ranger Brook Canyon 264 



Fig. 2. 



Inclined strata on Johnston Creek 264 



32. Fig. I. 



Johnston-Wild Flower Canyon Pass 268 



Fig. 2. 



Canyon from Johnston Creek to Badger Pass 268 



33. Douglas Creek 268 



34. Nearer view of plate 32, figure 2 272 



35. North side of Mount Douglas 272 



36. Gwendolyn glacier 272 



37. Mount St. Bride 272 



