540 



INDKX. 



Oi'ihoni/cfti(t /onnnmit< :U1 



c irthotlu'tus 222 



illifillmlis 21.S. 'Jiy, 221, 22'!, 22(;, 22il, 230, SJIt-a?!) 



lens 27.S 



Ortliotirliia inorgiiniann 34G 



schiu'hertensis 238, JJ46-340, /,Sii 



Ouriiy, lossils from 253-257, 317-319, 323, 329, 331 , 



347-349, 3.S2-35-1, 358-362, 3M-367, 370-371, 379-3S0 

 Ouray liiuostone, age and equivalents of. .169, 170, 209,212, 217 



elm racier and thickness of 169,170 



fO-ssiLf from 162,218,269-2t;6,292- 



293, 294-296, 299, 303-306, 307-313, 315-316, 381-387, 



392, 394, 403-107, 417, 419, 420-421, 471-473, 477-478 



occurrence of 123, 162 



Paleozoic series, eastward tliinningof 21.V216 



unconformities in 211-214 



Paleozoic time, sedimentation during 214 



Paradox Valley, rocks exposed in 136 



Paradoxides 152 



Park Range, rocks exposed in 82 



section of 81 



Parting quartzite, age of 55, 160-161, 200, 212 



character and thickness of 65, 156-161, 200 



Patellostium helhim 249, 252, 253, 472, 473, 4J4-475 



montfofta}! iti< 473 



montifortianum 243, 247, 249, 252, 261, 472, 47:5-474 



nodocarinatus 261 



nodncostatum 472, 474 



ourayense , 471-473,538 



textiliforme 474, 475 



Peale, A. C. , cited on Cambrian along Front Range ... 144 



cited on Front Range 106 



cited on Leadville limestone 170 



cited on Paleozoic rocks of the Dolores River 



region 195-196 



cited on Red Beds 185, 186 



cited on rocks of the Crested Butte quadrangle. . 173-174 



cited on section in Perry Park 152-153 



cited on Silurian rocks of Colorado 203 



cited on Triassic (?) and Carboniferous rocks near 



Colorado Springs 186 



cited on Weber shale on Eagle River 175 



fossils collected by 239 



quoted on beds near Colorado Springs 145 



reference to 12, 13, 51, 79, 148 



report of, for 1873, rcsiuni5 of 80-S3 



report of, on Dolores River region, r(5sume of . . . 132-137 



report of, on Elk Mountains, resumiS of 76-78 



report of, on Grand River region, r6sum6 of 57-66 



sections given by 145 



section in Perry Park cited from 167 



sections on Trout Creek cited from 151, 152 



section through Glen Erie cited from 153 



Pecien broadheadii 418 



carbonifems 418 



cleavelandicus 414 



havml 418 



missouriensis 414 



oecklcntalis 414 



tenriiUncatus 419 



Peleeypoda, descriptions of species of 306-310, 414-450 



Pennsylvanlan series of rocks, fossils of 231-267, 317-480 



occurrence and character of 170-216 



Permian rocks, occurrence of 174-176, 195 



Perry Park, equivalent of Millsap limestone in 185 



fossils from 225,230-231,291,298 



liigc. 



Perry Park, Millsap limestone at 107 



Red Beds in . i'<5, 186, 187 



rocks exposed in lOiii-lOO 



section at \\f, 



Plianerotrema constrictum 451; 



cl. grayvillen.se 243, 261, 4o.'>. 4.56 



sp. 



Pliillipsia loganensis 315 



major 242, 243, 252, 257, 261, 477-178 



peroccidcns 21s, 231 , SI . 5-3 1 (i 



trinucleata 236, 237, 242, 249, 252, 261, 4;s, r,ls 



SP 34, 4G 



Pholadom.va clongata 43s 



Pikes Peak quadrangle, Cambrian rocks in 143-144 



Carboniferous and Jurassic rocks in 187, 191 



fassils from 225. 230-231 , 2S5-286 



Ordovician rocks in 150-151 



stratigraphy in 97-99, 151-1.54 



Pinna ^e^^ 



adamsi 430 



peracuta 439 433 



prisca / 432 



P/aetmopsis carbonana 426 429 



Plagioglypta 4.%^ 45]^ 452_(53 



annulistriata 452 453 



«™na 452,453 



granda;va 452,453 



granvillensis 452,453 



illinoisensis 453 



meekiana 452, 453 



primaria 452,453 



undulata 453 



venusta 453 



Platyceras 310 



fannosum 311 



nebrascensc 461 



neb^-ascensis 461 



ncbraskense 327, 461 



paralitun 218,231,311 



parvum 249, 250, 252, 261, 461-462,5JS 



sp. (cf. P. paralium) 311 



Platycrinua sp 218, 230, 27 U 



Plaiyostoma nana 462 



Pleasant Park, rocks exposed in 107 



See Perry Park. 



Plenrophorus 36,60,62,174,185,199 



angulatus 234,445-446 



oblongus 113,308,449 



occidentalis? 243, 253, 260, 446-447 



subcostatus 253, 420, 444-445, 446, 459, SU 



taffi 445 



sp 35,42 



Pleurotomaria 



bicarinata 



cf . carbonaria 



excelsa 



grayviltensis 



liurii 



monilifera 



spironema 



tabulata 456, 



taggerii 81 , 453, 



turbiniforMis 



sp. 



sp. a 225,231 



?sp. b. 231, 



Plicatula striatocostafa 



Plum Creek, stratigraphy near 



53 

 454 



459 

 35 

 455 

 4.59 

 464 

 465 

 457 



,454 

 454 

 46 



314 



315 

 350 

 153 



