INDEX. 



I'liKe. 



Wyinniii^; foniiiitiim, mk"' nn'l i-quivtiU'iits of 5ti, 



177,190,204-206,210 



I'hiinicUT mid Ihicknoss of riil,ii{l, 177, l.s;}-184,20'l,240 



fxleiit 111 192 



strut i^rapliio rohitions of 183-184 



Wyoming' Hiimlstt)no, iigc and equivalents of 181, 194-195 



Wiirt iKMiiii tabuliita 258, 456-457 



Yampa riateau, fossils from, descriptions of 340,400-403 



Yampa River, fossils from near, descriptions of 320- 



322, 341-342 



Yampa sandstone, cliaracter and thickness of 32 



thickness and stratigraphic place of 197 



I'agf. 



Ynlc limestone, age and equivalents of 155, 15(>, 200, 212 



character and thiidiness of 147-150, 155, 1.57, ICO, 200 



Z. 



Zaphrentis 43, 63, 271, 273 



excentrica 271 



gibsoni 237, 248, 250, 259, 32S-3'24 



multilamella 271 



stansburyi 46,271 



tantilla 218, 219, 230, a69-270 



? sp. a 218, 219, 220, 230, 270 



7 sp. b 221 , 230, 27 1 



?sp. c ; 230,271 



Zenobia Peak, fossils from 46 



o 



