INDEX 441 



PAGE 



bivia, see BiUingsclla. 



Bj orkelunda, fossils from 264 



Blacksmith Fork Canyon, fossils in 58, 70, 88, 105, 106, 107, iio 



measurement of section in 5 



relative position and thickness of Cambrian formations in 6 



Blacksmith Fork section, correlation 171 



described 191-200 



graphic representation of 190 



resume of 199-200 



stratigraphic position of 169 



Blacksmith formation, correlated 171 



defined 7 



section of IQS 



Blochmann, Fr., bibliographic reference 161 



terminology of, for Brachiopoda I53, I54 



Bloomington formation, correlated 171 



defined 7 



fossils in 70 



section of I94-I95 



bohemica, see Acrothele. 



Boom Mountain, Lower Cambrian conglomerate near 426 



pre-Cambrian rocks on 430 



Bonne Bay, fossils from 266, 310 



Borgholm, Sweden, fossils at 85 



borgholmcnsis, see Acrothele. 



Bornemannia prima, stratigraphic position and association 213, 214 



sp. undt., stratigraphic position and association 214 



Bosworth formation, correlated 171 



defined 3 



Castle Mountain, view showing pi. 20, figs, i and 2 



Mount Bosworth, section of 205-208, pi. 19 



Bosworth and Paget formations. Mount Bosworth, break between 215 



Bosworth, Mount, fossils from 22 



Bosworth section, see Mount Bosworth. 



bosworthi, see Albertella. 



Botsfordia, classification of 142, I4S 



compared with Acrothele 90 



Acrothele (Redlichclla) 90 



evolution of pi. 11 (pp- 140-141) 



mentioned 77 



reasons for referring species to it 78 



? barrandei, new species 77 



compared with Botsfordia pnlclira 78 



C(Blata, mentioned 279 



graniilata, compared with Acrothele (Redlichella) 89 



pulchra, compared with Botsfordia barrandei 78 



bottnica, see Oboliis {IVestonia). 



Bow Range, photo showing pi. 46, fig. 2 



