G28 



PROCEEDINGS OP THE ACADEMY OF 



[Dec, 



Pecten nucleus 365 



(^Equipecten) operculari- 



forrnis 365 



(Plagioctenium) operculari- 



formis 365 



papyracea 365 



scissuratus 364 



thetidis 365 



(Amusium) touke 365 



Pectinidae 364 



Pectunculus acuticostatus 364 



Pedanostethus riparius 445 



Pellenes borealis 455 



peregrinus 455 



Pellonia bleekeriana 210 



castelnaeana 210 



Pellonula 208 



Pentstemon confertus 68, 96 



glaber 27 



Perca 4 



flavescens 13 



Perenna 585 



PetaJoconchus domingensis 359 



Petromyzon marinus 5 



Peucedanum 26 



graveolens 40, 68, 81 



simplex 68, 81 



Peucetia viridans 454 



Phacelia circinata 68 



menziesii 68, 98 



Phalangidse 456 



Phalaris... 69 



arundinacea 68, 86 



Phanetta 397,398 



Phasmidae 328 



Phenacogaster bairdii 422 



bondi 419, 421, 422, 424 



megalostictus 421 



microstictus 422 



pectinatus 421 



Phibalosomina? 335 



Phidippus 396,403-406 



andax 454 



insigniarius 454 



podagrosus 454 



purpuratus 402 



rufus 455 



Philseus militaris 455 



Philodromus carolinus 452 



ornatus 452 



rufus 452 



Phlegra leopardus 455 



Phlccum alopecurus 69 



alpinum 69 



Phlox longifolia 26, 69, 91 



Pholcidae 441 



Pholcus 395, 396, 413 



phalangoides 44 1 



Phoradendron juniperum 69 



Phos gabbi .' 349, 350 



gatunensis 349, 350 



metuloides 349,350 



Phos semicostatus 350 



subsemicostatus 350 



Phragmites 38 



communis 69, 88 



Phrurolithus alarius 442 



formica 442 



palustris 442 



sp 442 



Phrynosoma cornutum 229 



douglassii brevirostre 229 



frontale 229 



hernandezi 229 



h. ornatissimum 229 



modestum 229 



regale 229 



Phthoa 334 



occidentalis 334 



prolixa 334 



Physa gyrina 198 



humerosa 198 



orbignyana 198 



traskii 198 



virgata 198 



Physidaa 198 



Piabucina astrigata 515 



aureoguttata 513 



Piabucininse 513 



Pimephales 4 



notatus 7 



Pinaceoa 19 



Pinus edulis 69, 79, 92 



monophylla 33, 40, 69, 92 



Pirata minuta 454 



montana 454 



Pisauridse 452 



Pisaurina undata 452 



Pisidium sp 198 



Pitar centangulata 369 



circinata 370 



cora 370 



floridana 369 



hilli 370 



Pitaria (Lamelliconcha) circinata .. 370 



(Hyphantosoma) floridana 369 



(Lamelliconcha) hillii 370 



(Hyphantosoma) opistho- 

 grammata 369,370 



Pituophis catenifer deserticola 232 



Plagyodontidae 571 



Plagyodus ferox 571 



Planorbis defiectus 198 



tenuis 198 



Plantago eriopoda 69, 94 



major 69 



patagonica 69, 94 



Platynereis agassizi 247 



Plecoglossus 497 



altivelis 555 



Plecostomus verres 436 



Plectana stellata 450 



Pleurodonte 124, 128, 139, 159 



