376 INDEX 



PAGE 



Rocks, Character of the (in pre-Devonian formations) : 203 



Ross Lake section 306 



Ruedemann, Dr. Rudolf .7, 12. 15, 33, 34, 187, 214, 219 



Sabine formation (Upper Cambrian ) 49, 227 



Sabine Mountain section 25 



St. Piran formation (Lower Cambrian) 252 



Sarbach formation (Canadian) 35, 220 



Sawback formation 190 



Sawback Range area 263 



Sawback Trough 167 



Schofield, Prof. S. J 3, 4, 6, 25, 30, 49, 227, 228 



Schuchert, Dr. Charles 149, 192 



Section on northeast shoulder of Fossil Mountain 287 



Shepard, Francis P 3, 5,25 



generalized section of 5 



Sherbrook formation (Upper Cambrian ) 241 



Shimer, Dr. H. W 193 



Siffleur River section 333 



Silurian 21 1 



Silurian limestone 32 



Sinclair Canyon section 9 



figured, text fig. 2 10 



summary of section of Mons in 20 



Sinclair formation (Ordovician) 14, 34, 50 



Sinclair section, summary of the 21 



Skoki formation (Ordovician) 217 



Slate Mountain group 277 



Stephen formation (Middle Cambrian) 247 



Stoddart-Dry Creek section 21 



Stratigraphic sections 9, 259, 352, 358 



Sullivan formation (Upper Cambrian) 244 



Symphysurina Ulrich, genus, described 108 



? entella, new species, compared 112 



eugenia. new species, compared 113 



spicata Ulrich (MSS.), described 113 



zvoostcri Ulrich (MSS.), new species, Ozarkian ^y 



described 115 



figured, text fig. 8 38 



TaenicephaJus LTlrich and Resser (MSS.), new genus. Upper Cambrian. ... 59 



described 116 



figured, pi. 13, fig. I 



shumardi (Hall) Ulrich and Resser 117 



Tah formation (Lower Cambrian) 255 



Tatei formation (Middle Cambrian) 250 



Titkana formation (Middle Cambrian) 248 



Tostonia, new genus. Upper Cambrian 59 



described 117 



figured, pi. 13, fig. 2 



iole ( Walcott ) 118 



