INDEX. 



543 



Seminula subtilita 34, 35 



36,38, 45, 46,77, 90, 91, 112, 113. 129, 167, 168, 199, 223, 

 233, 234, 236, 237, 238, 242, 243,'244, 247, 248, 249, 251, 

 253,254, 255, 2.57, 200, 262, 266, 299, 393, 403-407,506 



wasatchensis 298 



sp 218,230,299 



Septopora delicatula 242, 259, 337 



sp 247, 250, 259, 337 



Serpula (Sinrorbif) planorbiles 465 



Shinarump group, age and stratigraphic place of 41-42, 



197,198,199-200 



rocks at base of 31 



thicknessof 197,198,204 



Sigillaria .' 90 



Silurian rocks, occurrence of lo6 



Silverton quadrangle, fossils, from, descriptions of. - 319-320 



Sinbads Valley, fossils from 257- 



258, 320-322, 34,>-347, 3.56^357. 3.58-3-59, 362-363, 385- 

 387, 436-437, 448, 456-4.57,463-464,46.5-466,470-171 



Siver L. D.. reference to 52 



Soleiiiscns ptdiulhia-fot mh 467 



{MacfochcUtts) patiiduKv/unnis 466,467 



cf . paludiniformls ; 233, 466-467 



ponderosus lli-t 



South Park region, fossils from 239-245 



Leadville limestone in 165 



location of 28 



Maroon formation in 178 



Ordovician rocks in 149 



Parting quartzite in 158, 159 



reports on, resume of 78-83 



Weber formation possibly in 179 



South Platte River, rocks exposed near 107-108 



Spanish Peaks, rocks exposed near 94, 120 



Spencer, A. C, acknowledgments to 8 



reference to 17 



Spencer, A.C.,and Cross, Whitman, cited on Dcvoin'an 



rocks 156 



cited on Dolores formation 20.5-206 



cited on Ouray limestone 169,170 



cited on Rico formation 193 



cited on San Juan region.. 160 



fossils collected by 161,245 



Spirifer 60, 62, 71 . 81 , 90, 163, 174, 223 



aciculifer 290 



agelains 290 



asper 289 



boonensis? 234,236,243,247, 



248, 249, 251, 2.54, 2.55, 2.57, 2i;0, 265, 2,S5, 381-383, S02 



cameruUi 386, 387 



cameratus 35, 



42, 46, 91 , 199, 233, 234, 236, 237, 238, 247, 248, 

 249, 251 , 255, 257, 260, 381, 382, 384, 385-387 



1 Tiigonotreta) canieratus 386 



ijiiiaig 0/ 386 



campestris 237 



carterL 293 



centronafa 285 



centronatus 218, 



219, 224, 225, 226, 229, 230, 285-286,287, 296, 382, 383 



var 230 



r.uspidatuaf 293 



decussata 388 



J'asciger 385* 



flmbriatus 388 



( Cyriiaf) hannibcdensis 293 



hemlplleaia 346 



hirtus 3.S8 



Page. 



Spirifer granulosus 289 



imbrex 42, 199 



Imbrlcata 388, 389 



increbescens 286, 287 



ineqiiicostatiis 385 



koituckcnsts 400 



keoknk 286,287,384 



laminosus 400 



llneata 388 



(Mariinia} liiiralii? 393 



lineatus '. . 38, 46, 388, 389, 392, 393 



(Martinia) Uncutiis 393 



var. slriato-laieatus 392 



var. perplexa 392 



mareyi 289 



mcuscbaclian us 385 



microgemma i... 388, 389 



ocloplimla 400 



octoplicatus 46 



opima 383 



opjmus 46. 81, 382, 383, 384 



( Triijonvtn In) irpimiia 383, 384 



organensis 382 



parryanus 2S9 



peciiliaris 218, 219, 230, 292-293 



{Mayiinki) pcciitiari^ 292 



perplcm 392 



perplexns 388 



planoeoin'cxti 394 



(Jfartiiiia) pianoconrexa 394, 395 



pkinoconi^cxtri^ .395 



■pseudolineatus 388 



reticulata 388, 3.89 



rockymonkma 384 



rockijmontani (pars) 383, 385 



rockymontanus 34, 35, 



154, 167, 168, 227, 234, 236, 237, 238, 242, 243, 247, 248, 

 2.51, 252, 2.55, 266, 2.57, 260, 265, 2S6, 287, 383-385,50;? 



schueherli , 223, 290 



mlidlroHris ': .' 229, 294 



slriuUia var. triplicatus 385 



subtequalis 286 



subcardiformis 292, 298 



suborbicularis 292, 293 



mbventricosa 383 



triplicata 385 



vanuxemi ■. 2,S9 



sp. a , 221, 230, 287 



sp. b 221, 226, 229, 230, 287-292 



sp ,. 129,1,31,242 



Spirifera ( Ti'igonofniff ) bipUcata 285 



canicratu 386', 387 



carter!. 293 



ixntronaUi 285 



{Spiri/eriiiu i kmhirtinmn 400 



lineata 222, 393 



{Mariinia) lincatu f 393 



opvinO' - 384 



ppimus 383 



' pecidiarie 292 



perplexa 393 



{Mariinia) perpicxa 393 



planoconi'cxa 395 



planoconrnxus 395 



rockiimonlana 222, 224, 384 



{Athyris) subtilita 404 



Spiriterina 60, 163, 167, 174 



aeiculifera , 223, 290 



