442 s]\riTHsoxiAiNr miscellaneous collections vol. 53 



PAGE 



Bow River group, rocks formerly referred to 424 



subdivision of 2, 4 



Mount Bosvvorth, section showing strata of 215 



Valley, Lower Cambrian conglomerate exposed in 424 



photograph showing pl- 45, fig- i 



sediments in 217 



topography of 424 



Brachia, defined 154 



Brachiocoele, defined 154 



Brachiopoda, articulates all calcarous 150 



classification, in detail 142-148 



table of 142 



development in Cambrian time 141 



distribution of families in Cambrian time 140, 141 



distribution of genera in divisions of Cambrian pi. 11 (pp. 140-141) 



and p. 141 



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



evolution of families 140 



inarticulates, shell substance of 149 



microscopic shell structure of 150-153 



microscopic shell structure of articulates 151-153 



nature of shell matter only of generic importance 150 



structure of shell 149-153 



works on 149 



terminology defined 154-160 



terminology used for 153 



thin-sectioning of 150 



Brachiopode, nouv. gen., de Verneuil and Barrande, in synonymy "/j 



brachycephalus, see Paradoxidcs. 



Brantevik, fossils from 342 



Brigham formation, an overlapping shore deposit of Midde Cambrian. ... 8 



correlated 171 



defined 8 



distinguished from Prospect Mountain quartzite of Nevada 9 



Flathead sandstone 8-9 



Brigham formation. Blacksmith Fork, section of 199 



British Columbia, future work in 2 



location of Cambrian sections measured i 



relative position and thickness of Cambrian formations in 2 



British Columbia and Utah, connection between sections in 169 



broeggeri, see Holmia. 



Brogger, W. C, bibliographic reference 372 



broggeri, see Callavia, Cephalacanthus, Holmia, Olcncllus, OlcncUiis {Hol- 

 mia), and Olenelhis (Mcsonacis). 



Broggeria, evolution of .pl- n (PP- 140-141) 



(Broggeria) salteri, see Obolits. 



Bronteus, intergenal spines of 237 



