480 INDEX 



PAGE 



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



Big Creek, Hawkins County, Tennessee, Upper Cambrian locality 124.170, 172 



Upper Cambrian locality 124a 172, 219 



localities 125, 125a 215 



Bighorn dolomite, origin of 92 



bigsbyi, see Anomocare and Anomocarclla. 



Big Snowy Mountains, Half Moon Pass, Montana, ^liddle Cambrian 



locality 54Z 385 



Paleozoic formations 273 



Big Snowy section of Calvert 276 



Billingsella obscura Walcott, listed 373 



puuipellyi Walcott, listed. Upper Cam1)rian, Ch'au-mi-tien 68 



Sin-t'ai 67 



stratigraphic and geographic position 45 



richthofeni Walcott, listed, Man-t'o, Shan-tung 61 



stratigraphic and geographic position 45 



salemcnsis (Walcott), listed 3x7 



whMeldi (Walcott) , listed 369 



bion, see Dolichometopus. 



Biotic record, Algonkian rocks 97 



Birch Creek, Montana, Algonkian locality 400b 114 



Bird Bridge road, Tennessee, Upper Cambrian locality ii8a 215, 404 



Birmingham City, Jefferson County, Alabama, Upper Cambrian locality 



358e 170, 178, 215 



bispinosa, see Dorypygc. 



biston, see Anomocare and Anomocarclla. 



bithus, see Bathyiiriscus. 



Blackf oot series, range of Collenia 98 



Blackwelder, Eliot, acknowledgments 3 



bibliographic references y^ 



cited on Bighorn dolomite 92 



discussion stratigraphic relations 31 



historical review, Chinese Cambrian 7 



age, Yung-ning sandstone 49 



Dorypyge richthofeni fauna, Shan-tung and Shan-si. .. 10 



fossils, lower Tsi-nan 41 



localities €1=32, €333=36, €38=42, €45=57, €60=64, 



€68, and €69 17-30 



lower Kiu-lung 40-41 



collections by 17 



section by, compared with Bergeron's Cambrian fossils 7 



sections by 54. 55 



see Willis and Blackwelder. 

 blackwelderi, see Damesclla and Obolus {Westonia). 



Blackweldcria Walcott, distinctive in Chinese Middle Cambrian 70 



exceptional to China 59 



relation to Ku-shan 66 



