495 



Page. 



Pbysa Nuttallii 135 



occidentalis 135 



parva 

 propinqua 



135 

 135 



Saffordii 135 



virgata 135 



Wolfiana 135 



Physidte 134 



Physopoda, Tertiary of Colorado, by Samuel H. Scudder 221 



Phy tocoridse • 315 



Phy tocoris nubilus 317 



scrnpeus , 317 



Pidgeou's Peak 178 



Pike's Peak 218 



Pindus socius 328 



Pinus Queudstedti 392 



Piratina 329 



Pisidium abditum 139 



compressum 140 



occidentalis ^ 140 



nltrauQontanum ■. 140 



Placier Gulch 158 



Plagiognathus obscurus 319 



Plauera Ungeri 387 



PlanorbiiiEe 13f> 



Planorbis gracilentus 137 



Hornii -.- 137 



oregonensis - 137 



subcrenatus - • 137 



Plants, fossil, from the Lignitic formations 363 



descriptive of species from Point of Eocks 363 



Platteyille, fossils from near 39 



Podisus cynicus 282 



modestus 283 



pallens 282 



spinosus 282 



Podopina — 274 



Podops dubius 274 



PcECiloscytus diffusus 318 



Yenaticas 318 



Point of Eocks, fossil plants from • ". 363 



evidence of plants from 372 



table of fossil plants from 375 



Polybori 231 



genera of 452 



geographical distribution of 453 



monograph of 451 



Polyborus 454 



Cheriway 457 



lutosus 459 



Tharus 455 



Pomatiopsinge - 127 



PDmatiopsis intermedii 12^ 



Pompholiginse 137 



Pomphlox etfosa 137 



Populus aristolochiodes 393 



melanaria 370 



melanarioides 379 



Potaniogalidae 112 



Pride of the West lode 160 



Prionotus crisfcatus 3S7 



Prionosoma podopioides - 293 



Precoma costalis 357 



Prospector lode 161 



Protenor Belfragei 295 



Protophyllum ? trilobatum ■ 307 



Proxys punctulatus ^ 286 



Pseudophlosina 299 



Ptarmigan, White-tailed (Lagopus leucurus) 263 



