Bathyuriscus — Continued. 



(Poliella) primus — Continued. page 



compared with Bathyuriscus haydcni, B. {Poliella) anteros 



and B. (P.) occidentalis 352 



Bathyuriscus {Poliella) balus 350 



Bathyuriscus (Poliella) sp. undt. ( i ) 355 



length 331, 349 



stratigraphic range and geographic distribution 332 



{Poliella) probus, new species, described 354 



figured, pi. 65, figs. 2, 2a 452 



compared with Bathyuriscus haydeni and B. (Poliella) 



powersi 354 



Coosia 354 



stratigraphic range and geographic distribution 332 



(Poliella) sylla, new species, described 354 



figured, pi. 48, figs. 3, 3a-/ 418 



compared with Bathyuriscus (Poliella) anteros and B. 



haydeni 354 



Bathyuriscus howelli 355 



(Poliella) sp. undt. (i), described 355 



figured, pi. 46, fig. 7 4^5 



compared with Bathyuriscus (Poliella) primus 355 



Bathyurus ? haydeni Meek, synonymic reference 34i 



parvulus Billings, genotype of Bonnia 325 



synonymic references 328 



senectus Billings, in synonymy 3^9 



batis, see Bathyuriscus. 

 baton, see Dolichometopus. 



Bays Mountain, Tennessee, Upper Cambrian locality 120 399, 40i 



Bays Mountains, Tennessee, Middle Cambrian locality 10 37i 



belesis, see Bathyuriscus. 

 belus, see Bathyuriscus. 

 bessus, see Dolichometopus. 



Bic, Quebec, Canada, Lower Cambrian locality 20 315. 323, 327, ,329 



associated fauna 322 



Lower Cambrian locality 2r 3i4- 329 



Bicia gemma (Billings), listed 322 



Big Cedar Bridge, Georgia, Middle Cambrian locality 142a 372 



Big Cottonwood Canyon, Utah, Middle Cambrian locality 30a 336 



Big Snowy Mountains, Half Moon Pass, Montana. Middle Cambrian 



locality 54Z 385 



Billingsella obscura Walcott, listed 373 



Billingsella salemensis (Walcott), listed 3'^? 



Billingsella whitHeldi (Walcott), listed 369 



bion, see Dolichometopus. 



Bird Bridge road, Tennessee, Upper Cambrian locality 11 8a 404 



bithus, see Bathyuriscus. 



