1911.] 



NATURAL SCIENCES OF PHILADELPHIA. 



629 



Pleurodonte acuta acuta 143 



a. goniosmos, 126-128, 130, 139, 



140, 143-147, 149, 150, 152-154, 



157, 160-162, 580 



a. patina 143 



a. semperfluens 578, 580 



a. sublucerna 578 



(Dendrocochlis) aspera 573 



bainbridgei 135-138, 156, 157 



b. pretiosa .135, 136, 138 



(Eurycratera) jamaicensis, 126, 



127, 130, 132, 573, 578 



lucerna 573 



sinuata 573 



sinuosa 578 



sloaneana 573 



subacuta 580 



Pleuronectia lyonii 365 



Pleurotoma albida 343 



consors 3J t 5 



gertrudis 345 



(Genota) gertrudis 345 



Pleurotomaria abbotti 534, 535 



crotaloides 534, 634, 535, 535 



woolmani 534, 535 



Pleurotomidse 343 



Poa californica 69, 93 



pratensis 70, 80, 85 



tenuifolia 69,86 



Podozamites formosus 17 



Pcecilasma 172 



(Temnaspis) fissum 171 



tridens 172 



Pceciliidse 436 



Poenia 585 



Pogonias cromis 16 



Pogonomyrmex occidentals 37 



Polemonium caeruleum 70, 81 



Polinices subclausa 360 



Polygonum amphibium 70, 89 



erectum 70,80 



hartwrightii 70, 87, 92 



imbricatum 70 



juniperinum 70 



viviperum 70, 94 



Polygyra albolabris 531 



* a. alleni 526 



appressa perigrapta 531 



denotata 526,531 



inflecta 526-530 



leporina 526-528,531 



monodon friersoni 531 



obstricta carolinensis 527 



thyroidus 526-531 



Polyschides 168 



Polyspilota 321 



pustulata 321 



striata 321 



variegata 321 



Polytrichum 63 



juniperinum 88, 89, 93 



Pomatomus saltatrix 12, 203 



Pomolobus aestivalis 6, 206 



chrysochloris 206 



mediocris 6, 206 



melanostomus 208 



pseudoharengus 3, 6, 206 



Populus angustifolia 70, 91 



tremuloides 70, 91 



Poronotus triacanthus 12 



Potentilla anserina 70 



fruticosa 70, 97, 98 



glandulosa 70, 89 



pennsylvanica 71, 83, 84 



plattensis 71 



Primula parryi 71, 90, 94 



Prionotus carolinus 15, 203 



Pristigaster flavipinnis 210 



Pristis pectinatus 16 



Prochilodinse 495 



Prochilodus amazonensis 497 



cephalotes 497 



humeralis 497 



ortonianus 497 



steindachneri 497 



stigmaturus 495 



teraponura 497 



Proserpina nitida 576 



Proserpinidae 576 



Proserpinula infortunata 573 



Prunus demissa 27, 34, 39, 71, 95, 96 



Pseudauchenipterus guppyi 433, 436 



nigrolineatus 434 



pasece 434 



Pseudopleuronectes americanus 15, 203 



Pseudotsuga douglasii 35, 71, 80, 97 



Pterengraulis atherinoides 220 



Ptilichnus 544,545 



anomalus 545, 546 



hydrodromus 545 



pectinatus 545 



Pupa hebes 197 



syngenes 193 



Pupilla 184,194 



blandi 194 



hebes 197 



h. kaibabensis 197 



syngenes 193-195 



s. avus 176, 195, 196 



s . dextroversa 1 94- 1 96 



Pupillidae 193 



Pupoides hordacea 193 



marginata 193 



Purshia tridentata 26, 71, 81 



Pygocentrus stigmaterythraeus 424 



Pygopristis 432 



serrulatus 432 



Pyramidula alternata 526-532 



(Gonyodiscusj cronkhitei 191 



Pj'rula near papyratia 356 



Pyrus sambucifolia 71 



Quercus undulata 27, 34, 71, 83 



Raja eglanteria 5 



erinacea 16 



