890 



INDEX. 



Page. 



Pinna iddingsi n. sp OSO, 804 



Pinus macrolepis n. sp 079. 800 



Pinus premurrayana n. sp 67 7-678. 50-f 



Piiius scopnlorum 678 



Pinus sp 67 8-079 



Pinus Wardii n.sp 079-680 



Pinyon Peak, features of 184-188 



Pirsson, L. V., analyses by 354 



cited 241 



Pitcbstone Plateau, rhyolito of 379-381 



Pityoxylon aldersoni n. sp 703-764, 852,864,866,878 



Pityoxylon ainethystinum n.sp. 704-7O5, 854,856, 86S.S76 



Pityoxylon fallax Felix 764 



Placenticeras placenta (De Kay) Meek 640 



Plagioclase, ebaracter of phenocrysts of 399 



Planera Ion gi folia Lx 712 



Plants, fossil, descriptions of 651-882 



localities of 651-655 



plates showing 794-SS2 



Platanacea?, descriptions of species of 727-729 



Plataniniunibaydeni Felix 707-709, 880 



Plataninium porosum Felix 769 



Platan lis borealis Casp 763 



Platanus dubia Lx 745 



Platanus guillelmas Gb'pp 727-728, 834 



Platanus haydenii New by 706 



Platanus klebsii Casp % 769 



Platanus montana n. sp 728-729,532 



Platanus nobilis Newby 745 



Platanus occidcntalis L 768 



Platanus raynoldsii Newby 72 J 



Platyceras Conrad 574-570, 581 



Platyceras cornuforme Wincbell 574 



Platyceras uebrascense Meek 576 



Platyceras priinordialis Hall (?) 453.-* .'J 



Platyceras vomerium Winchell 574 



Platycrinus baydeni 515-51G 



Platycrinussymmetricus Wachsmuth and Springer. 488, 



515-510 



Platystoma minutura n.sp 500-507,<xV> 



Pleuromya newtoni "Whitfield 62G 



Pleuromya subcompressa Meek 026-027, 646 



Pleuromya -webereusis Meek 626 



Pleurotomaria isaacsi Hall and Whitfield ( ?) . 480, 505, 580 



Pleurotomaria (?) sp 506 



Populoxylon 760 



Populus amblyrbyneba Ward 694 



Populus balsamoides Gopp 090 



Populus dnpbnugenoides Ward 090 



Populus genatrix Newby 695 



Populus glandulifera Heer 094, 808 



Populus greniopsis Ward 696 



Populus oxyrbyncba Ward 694 



Populus speciosa Ward 094, 808 



Populus(?) vivaria n. sp 090-097, 81$ 



Populus xantholithensis n. sp 095-096 



Populus zaddacbi Heer 694 



Porifera, descriptions of species of 508 



Porpbyry, occurrences of 10. 20, 94-97 



Productella alifera n. sp 492, 530-531 , 587 



Productella arcuata Hall 533 



Productella concentrica Hall 529, 530 



Productella cooporensis Swallow 492, 528-530, 587 



Productella pyxidea Hall 529,530 



Productella sbumardiana Hall 529, 530 



Productus flemingi var. burlingtonensis 535-536 



Productus gallatinonsis n. sp 533-534, 537,556,557 



Page. 



Productus lsevicosta Wbite 489, 534, 591 



ProductuB la j vicostus "White 534 



Productus newberryi Hall 531,532 



Productus lie wherry i Var. annosus 536 



Productus parviformis n. sp 488, 533, 536-537, 5S6 



Productus parvus M. and W 488 



Productus parvus White 488, 537 



Productus papulata 530 



Productus scabriculus Martin 531-533, 590 



Productus semireticulatus Martin .. 489. 533, 535-530, 591 

 Proetus logauensis Hall and Whitfield. . 489, 577-578, 099 



Proetus peroccidens Hall and Whitfield 489 



570-577,577,578,599 



Prospect Peak, analysis of basalt from 438 



Protocaidia sbumardi M. and H 621 



Protozoa, descriptions of species of 507 



Pseudobrookite, occurrence of 401—402 



Pseudomonotis curta (Hall) ! 617 



Pseudomonotis (Euiuicrotis) curta Hall 617 



Pteria iuucronata.M. and H 616 



Pteria (Oxytoiua) munsteri (Brown) M. and H 616 



Pteria (Oxytoma) nebrascana (E. ami S. ) Meek 637 



Pteris erosa Lx 668 



Ptcrospermites haguei n. sp 742, S3S 



Ptiloporasp 5 17-518 



Ptychoparia autiquata Salter sp 450-457, 458, 478 



Ptychoparia (,') diademata 460-461, 402, 476 



Ptychoparia eryon Hall 453 



Ptychoparia (Euloma) affinis Walcott 457,47? 



Ptychoparia lianocnsis Walcott (?) 458, 476 



Ptychoparia (Loncbocephalus) hamulus Owen 461 



Ptychoparia (Loncbocephalus) wisconsensis Owen. 461- 



402 



Ptycboparia pen field i n.sp 450, 478 



Ptychoparia sp. undet 458, 476 



Ptychoparia (0 ep. undet 458, 476 



Ptychoparia striata 46O 



Ptychoparia teucer 458 



Ptycboparia wisconsensis 476 



Pugiunculus priinordialis Hall 454 



Pumice, occurrence of 403-406 



Pyroxene, character of phenocrysts of 399-400 



Py roxcne-andesite, occurrence of 294-295, 301-302 



photomicrographs of ISO 



Pyroxene-andesite-porpbyry, Mount Everts 85-86 



Pyrula ( ?) ap 639 



Q. 



Quadrant formation, comparison of sections of 41 



Quadrant Mountain, rocks of 33-35 



section of 34-35 



Quartz, characters of phenocrysts of 395-398 



Quartz-banakite, analyses of 347 



photomicrographs of 350 



Quartz-mica-diorite, occurrence of 252-256 



Quartz-mica-diorite-porphyry, characters of 103-105 



Quartzitc, occurrence of 7, 8, 33, 34, 47. 48 



Quercinium knowltoni Felix 772, 773 



Quercin urn lamarense n.sp 7 7 1-773,576", 550, 5S2 



Quercus howeniana Lx 710 



Qucrcus brewcri Lx 704 



Quercus consimilis ? Newby 704, 814 



Quercus culveri u. sp 708, 709,514 



Quercus drymeja Ung 703 



Quercus laurifolia .Newby 708 



Quereus ellisiana Lx 059, 794 



Quercus furcinervis americana Kd 705, 816 



