INDEX. 



Pago. 



Amplexus zaphrentiformis 107 



Anchura prolabiata . 121 



ruida 120 



Anticlinal Structure v 10,17,24 



Appalachian Mountains ." 24 



Structure 9,24 



Area Coalvillensis 115 



Archajocidaris cratis 109 



Avicula Parkeusis 115 



Aspen Mountain ' 160 



district 153 



, Structure of 209 



Bannister, Dr. H. M 48 



Basin Province 6, 7, 29 



, Orograpbic structure of ". 23 



, Summary of history of. 32 



Ranges 6,24 



, Sedimentary rocks of 8 



Range Structure 16,17,19,24,29 



Bellerophon carbonarius Cox, var. snbpapillosus 92 



Bishop Mountain Conglomerate, Distribution of 169 



relations 62,165,170,199 



type localities 44 



Bitter Creek Group, Distribution of , 162 



Delations 64,162 



, type localities 45 



Black Butte 160 



Quartzito 160 



Blake, Prof. VV. P., on the Plateau Province 3 



Bridger Group, Distribution of 167 



, Fossils of 105 



, relations 63,167,199 



, type localities 45 



Brown's Park Group, Distribution of 168 



, relations 63,199,208 



, Structure of 208 



Group, type localities 44 



Bruce Mountain 163 



Butte, Black * 160 



, Pilot 18,25 



Buttes 15 



Cameo mountains 15 



Cameo Mountains 15 



Structure 15 



211 



