INDEX 547 



PAGE 



Protophareta sp. undt., listed, Siberian Cambrian 8 



Protespongia, discussed under Porifera 58 



chloris Walcott, listed, Shan-tung and Manchuria 70 



Kiu-lung 65 



stratigraphic and geographic position 44 



cf. fenestrata Salter, discussed by Walcott 293 



interpretation by Rothpletz 29 1 



sp. listed 317 



Protypus, mentioned 324 



specimen measured by error for Corynexochus stephenensis. 324 



hitchcocki (Whitfield), compared with Bathynriscus batis 338 



senectus Billings, synonymic references 315 



senectus parviilus Walcott, synonymic reference 328 



Psilocephalus Salter, compared with Illcenurus 405 



Ptarmigan Pass, Alberta, Lower Cambrian locality 35 1 328 



Pterocephaliis asiaticus Walcott, listed, Ch'ang-hia 66 



stratigraphic and geographic position 44 



busiris Walcott, listed, Sin-t'ai Upper Cambrian 67 



stratigraphic and geographic position 44 



f liches Walcott, stratigraphic and geographic position 48 



Pteropoda, discussed 59 



Ptychaspis Hall, associated with Dikelocephalus 6g 



identification. Upper Cambrian by 42 



prominent, Chinese and American Upper Cambrian 68 



Upper Cambrian characterized by 42 



acamus Walcott, listed, Ch'au-mi-tien 68 



stratigraphic and geographic position 48 



baiibo (Walcott) (^=DikelocepliaIus ? baiibo), generic reierences. . 15 



listed, Sin-t'ai 67 



Ch'au-mi-tien 67 



bella Walcott, listed, Ch'au-mi-tien Upper Cambrian 68 



stratigraphic and geographic position 49 



briso (Walcott) (^= Dikelocephalus f brizo), generic references... 15 



listed, Ch'ang-hia 67 



stratigraphic and geographic position 49 



cacus Walcott, listed, Ch'au-mi-tien 68 



stratigraphic and geographic position 49 



cadmus Walcott, listed, Ch'ang-hia 68 



stratigraphic and geographic position 49 



calchas Walcott, listed, Ch'ang-hia 68 



stratigraphic and geographic position 49 



callisto Walcott, listed, Ch'au-mi-tien . . . . ; 68 



stratigraphic and geographic position 49 



calyce Walcott, listed, Ch'ang-hia 68 



Ch'au-mi-tien 68 



stratigraphic and geographic position 49 



campe Walcott, listed, Ch'ang-hia 68 



stratigraphic and geographic position 49 



