INDEX 539 



PAGE 



Obolclla, associated with Corynexochus (Bonnia) parvulus 329 



asiatica Walcott, listed Man-t'o sandstones, Shan-tung 61 



stratigraphic and geographic position 45 



atlantica Walcott, discussed by Walcott 294 



interpretation by Rothpletz 291 



chromatica Billings, listed 321 



? listed, Siberian Cambrian 8 



f cf. chromatica Billings, cited, Lena limestone 72 



crassa (Hall), discussed by Walcott 294 



interpretation. by Rothpletz 291 



gracilis (=cf. Obolus obscurus), identified, Walcott, Tsing-tshou-fu 12 



nitida, listed, Tsing-tshou-fu 11 



(Westonia) ella, identified from Park shale 268 



Obolus chinensis Walcott, listed, Shan-tung and Manchuria 70 



Kiu-lung 65 



stratigraphic and geographic position 44 



cf. chinensis Walcott, listed, Indo-China 13, 62 



crassa (Hall) , listed 322 



daniesi Walcott, listed, Indo-China 13, 62 



listed, lower Kiu-lung 64 



Upper Cambrian, Chau-mi-tien 68 



Shan-tung and Manchuria 70 



Kiu-lung 65 



occurrence, strata above Middle Cambrian 64 



stratigraphic and geographic position 45 



f detritus Mansuy, listed, Indo-China 13, 62 



mcconnelli pelias (Walcott), listed 403 



matinalis (Hall), associated with Lonchocephaliis chippewaensis. . . 256 



Big Snowy Mountains 275 



? listed, Ch'ang-hia 68 



stratigraphic and geographic position 45 



minimus Walcott, listed, Kiu-lung 65 



stratigraphic and geographic position 45 



obscurus Walcott (p= Obolclla gracilis), identified, Walcott, Tsing- 

 tshou-fu 12 



listed, lower Kiu-lung 64 



Shan-tung and Shan-si 71 



stratigraphic and geographic position 45 



parvus Walcott, associated with Vanuxemella norfia 223 



listed 353 



prindlei (Walcott), listed 316 



roiundatus (Walcott), listed 403 



shansiensis Walcott, listed, Shan-tung and Shan-si 71 



Shan-tung and Manchuria 70 



Kiu-lung 65 



stratigraphic and geographic position 45 



tetonensis Walcott, listed 292 



willisi (Walcott), Hsted 337 



