CAMBRIAN CORDILLERAN SECTIONS 22g 



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 pupa, see Bathyuriscus. 

 pyxidicula, see Acrotreta. 

 quadriceps, see Dorypyge. 



Raphistoma sp 173 



retnnicha, see Eoorthis. 



Resting Springs, California, fossils at 187 



reynoldsi, see Oryctocephalus. 



romingeri, see Corynexochus and Platyceras. 



rotundatus, see Bathyuriscus and Obolus. 



rowei, see Holmia. 



rugosa, see Stenotheca. 



sagittalis, see Acrotreta. 



sagiftalis taconica, see Acrotreta. 



St. Charles formation, Blacksmith Fork 171, 191-193 



St. Piran formation, near Lake Louise 171, 207, pi. 22 



St. Piran formation, Mount Bosworth 215 



Salterella 186, 189 



Scapegoat Mountain, discussion of Albertella fauna on 203 



Scenella varians Walcott 211, 213, 214, 215 



sp. undt 181, 182, 189, 196 



Schizamhon typicalis Walcott 175, 192 



Scolithus linearis Haldeman 186 



sp. undt 186, 215 



sculptilis, see Micromitra. 

 serratus, see Neolentis. 



Sherbrooke formation, Mount Bosworth 171, 204-205, pi. 19 



Sherbrooke ridge, view of pi. 19 



Silurian ? rocks, section of on Dearborn River 200-201 



Silver Peak Group, California 185-1S8 



Silver Peak section, Nevada, correlation 171 



simplex, see Wimanella. 



Siphonotreta ? dubia, new species 189 



Spence shale. Blacksmith Fork 171, 197-198 



Spence shale, House Range 171. 183, pi. 17 



spencei, see Nisusia (Jamesella). 

 spinosus, see Zacanthoides. 



Spirifer 200 



spurri, see Acrothele. 



Solenopleura I7S, 176, 178, 180, 192, 199. 208 



Stenotheca elongata Walcott 189, 213 



of. rugosa (Hall) 189 



wheeleri Walcott 210 



sp. undt 199 



Stephen formation. Castle Mountain, view showing .pi. 20, fig. 2 



Stephen formation. Mount Bosworth 171, 209-212 



Stephen formation, Castle Mountain, view showing pi. 20, fig. 2 



stephenensis, see Karlia. 

 stissingensis, see Micromitra (Paterina). 

 stuarti, see Micromitra (Paterina). 

 subcoronata, see Ptychoparia. 



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