558 INDEX 



PAGE 



Billingsella archias, new species, Ozarkian, compared 501, 503 



described -. 5<>i 



figured, pi. 112, figs. 1-5 54o 



coloradoetisis Meek 474. 475 



(Shumard), compared 506. 525 



exporecta Linnarsson, compared 5 02 



holtedahli, new species, Ozarkian 523 



described 5 2 5 



figured, pi. 123, figs. 6-16 55 1 



olen, new species, Ozarkian, compared 503 



described 502 



figured, pi. in, figs. 8-9 539 



? opp'ms, new species, Ozarkian .' 481, 523 



described 525 



figured, pi. 124, figs. 1-3 549 



origen, new species, Ozarkian, described 503 



figured, pi. 121, figs. 1-3 549 



retroftexa (Matthew) , compared 502 



romingcr Barrande, compared 502 



striata Walcott, compared 502 



Blountia galba Walcott 474 



sp. undt 474 



sp. undt. 6411 473 



Blue-Green Algae, genera and species listed 221 



Bornemann, Dr. J. G 264 



Bosworthia Walcott, new genus, described 241 



gyges Walcott, new species, described 242 



figured, pi. 58, fig. 2 259 



simulans Walcott, new species, described 241 



figured, pi. 57, fig. 3 ; pi. 58, figs. 1, ia 258 



Brachiopoda, description of species 481 



Brachiopods of Novaya Zemlya, Russia 481, 523 



species described since 1912 480 



Branchiopoda, appendages 162 



relation to Trilobita 168 



Branchipus, position 120 



Briarfield formation (Lower Ozarkian) 469 



Brooks, memoir cited (footnote) 169 



Bucaniella ? isades Walcott 474 



lelex Walcott 472 



? leos Walcott 474 



Burgess shale, Stephen formation, fauna 117 



Burgessia 177. 426, 427 



Burling, L. D 10, II, 62 



Burmeister 120, 123 



Callithamnopsis fructiosa (Hall) Whitfield, compared 238 



Whitfield, compared 239 



Callopegma 3 21 



Caiman, Dr. W. T 37&, 380, 419, 420 



