INDEX 439 



Bathyuriscus — Continued. page 



productus, stratigraphic position and association 183, 197, 198, 203 



pupa, stratigraphic position and association 211 



rotundatus, compared with Bathyuriscus occidentalis 41 



compared with Bathyuriscus ornatus 41 



mentioned 17 



stratigraphic position and association 210, 211 



sp. a., mentioned 21, 22 



sp. undt., stratigraphic position and association 177, 178, 182, 183, 



203, 208, 209, 210, 211, 213, 214 



Bathyurus, eye of compared with that of Limulus 239 



sp. undt., stratigraphic position and association 205 



Beecher. C. E., bibliographic references in, 161, ^,72 



classification of trilobites proposed by, adopted 13 



definition of Opisthoparia 235 



on facial sutures of OUnellus 242 



on Olenclloides 347 



on the Paradoxinae 314 



Beekmantown formation, New York, fossils in 72 



bellapunctata, see AcrotJicle. 



beJlatida, see Acrothcle. 



belliantis, see Platyceras. 



bcllulus, see Obolus (Fordinia). 



Belt Mountain region, relation of Flathead sandstone to Brigham forma- 

 tion of Utah 8-9 



Belt Mountain uplift, mentioned 168, 191 



Belt Terrane, Montana, mentioned 203, 208 



Beltina, a fresh water form 252 



Bergeron, Prof. J., species named after 84 



bcrgeroni, see Acrothele. 



Bernard, H. M., bibliographic reference 372 



on the eyes of Limulus and Apus 239 



Bibb County, Alabama, fossils in 71 



Bibliographies in, 161, 218, 372 



Bibliography, C. D. Walcott's papers on the Brachiopoda 53 



Bic, fossils from 279, 339 



thin section of fossil from 165 



bicensis, see Callavia and Olenellus. 



Bicia, classification of 142, 144 



evolution of pi. il (pp. 140-141) 



Biciince, classification of 142 



defined' 144 



bidens, see Agnostus. 



Big Cottonwood Canyon, fossils from 93, 330 



Pioche formation in 12 



Big Cottonwood Canyon section, correlation 171 



stratigraphic position of 169 



Big Cottonwood Canyon sediments, probable nature of 170 



Big Horn Mountains, Wyoming, fossils in 68 



