INDEX 449 



PAGE 



HyoiithcUus Billings, genus named and in synonymy 267 



probably referrable to the annelids 121 



suggested by Orthoiheca glabra 76 



papillatiis Walcott, new species described 267 



figured, pi. 43. figs. 3, 4 292 



listed from Potsdam-Hoj^t fauna 254 



Hyolithes Eichwald, genus named 265 



carinatus Matthew, compared with Sclkirkia major 121 



figured, pi. 19, fig. 7 136 



listed in stratigraphic section 337 



? corrugatus Walcott, listed with St. Lawrence fauna 356 



cybclc Walcott, associated with Orthothcca glabra 76 



gibbosiis Hall and Whitfield, described 265 



figured, pi. 43, figs. 5.6 292 



in synonymy 265 



listed from Potsdam-Hoyt fauna 254 



primordialis Hall, listed from Eau Claire formation 358 



sp. undt, listed in stratigraphic section 336, 339 



new Lower Cambrian subfaurra 310 



Hypoparia Beecher, order named 195 



classification of I54 



Hypostoma or labruni 158 



Ice River Valley, British Columbia, Goodsir formation. Lower Or- 



dovician 232-234 



idahocnsis, see Acrotrcta. 



Iddings, Joseph P., collections made by, described 69 



iddingsi, see Asaphiscus. 



Illaenidse, mentioned 196 



Illcenurus elongatus Walcott, new species, associated with Dikeloccphahts 



? dalyi 368 



eurekcnsis Walcott, listed from locality 201a 359 



quadratus Hall, associated with Osccolia osrcola 386 



listed from localities 78 and 78b 361 



from localities 85 and 86 360 



with St. Lawrence fauna .' 356 



n. sp., listed from St. Lawrence fauna 356 



(a), listed in stratigraphic section 336 



(b), listed in stratigraphic section 336 



sp. undt., associated with Saiikia rnstica 383 



listed from Jordan formation 355 



Illustrations listed, " Abrupt Appearance of Cambrian Fauna " I 



" Cambrian faunas of China " 69 



"Cambrian formations, Robson Peak district" 328 



" Cambro-Ordovician boundary " 229 



" Dikelocephalus and other genera " 346 



" Middle Cambrian Annelids " no 



" Middle Cambrian Branchiopoda, Malacostraca, Triloliita. 



and Merostomata " 148 



