1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



605 



Polvnoe reticulata 2^1 



Polynoida? 240 



Polypogon littoralis 48S 



Pomolobus mediocris 407 



Populus monilii'era, 5S, 61, 67-71, 92, 



100, 103 



tremuloides 113 



Poronotus triacanthus 407 



Potamogeton perfoliatus 393 



Potentilla reptans 491 



Prionotus evolans strigatus 407 



Progne dominicensis 364 



Prosopis odorata Ill, 112 



velutina Ill, 114 



Prosthesima 569 



atra 562, 568 



Protula atypha 293 



superba 290 



Primus maritima 382, 383, 391 



Pseudometa alboa;uttata 209 



bella 208 



decolorata 209 



Pseudopotamilla brevibranchiata.. 289 



Pseudosermyle 120 



banksii 121 



straminea 115, 120 



tenuis 112, 121 



truncata 115, 120 



Pseudotsuga mucronata 113 



Psoloessa buddiana 144 



ferruginea 144 



maculipennis 144 



texana 112, 144, 428, 429 



Ps} T ehotria undata 486 



Pteridium caudatum 486 



Pteronarcys 33 



Ptilimniuincapillaceum....390, 394, 396 



Pupilla hebes 514 



syngenes 514 



Pupill'idse 514 



Pupoides hordacea 514 



Pvramidula (Gonvodiscus) cronk- 



hitei 513 



(Gonyodiseus) shimeki cock- 



erelli 514 



Pyrus arbutifolia 389 



Quadrula nickliniana 532 



semigranosa 532 



Quercus palustris, 57, 66, 67,69-71,91 



Querquedula discors 355 



Quiscalus niger 362 



sp 362 



Radiodiscus millecostatus 514 



Raja eglanteria 407 



erinacea 407 



lsevis 407 



Rana amurensis 401 



nigromaculata 401 



Randia aculeata 486 



Ranunculus acris 491 



Raphidia 22 



Reiehardia picroides 494 



Rhabditis aceti 107 



Rhaphidia 9 



Rhexia virginica 392 



Rhinoptera bonasus 408 



Rhizophora mangle 4S6 



Rhus copallina 394 



radicans 382, 385, 387 



toxicodendron 554 



Rhynchospora glomerata 396 



Runcinia magna 215 



Rupornis ridgwayi 357 



Ruppia maritima 398 



Sabal blackburniana 489 



Sabbatia angularis 392, 396 



Sabella elegans 288 



pacifica 268 



Sabellaria calif oniica 293 



cementarium 294 



Sabellida? 287 



Sagina procumbens 491 



Sagittaria variabilis 389 



Salicornia herbacea, 379-381, 383- 

 386, 388, 391, 398 



mucronata 380, 391, 398 



Salix babylonica 58, 64 



Salsola kali 380 



Sambucus canadensis 387 



Sarinda pretiosa 225 



Saurothera dominicensis 359 



Scsevola plumieri 486 



Scalibregma 282 



Scalpellum (Arcoscalpellum) cob- 



umbianum 367, 368 



gravelianum 368 



sanctipetrense 368 



soror 368 



Scenedesmus obliquus 393 



Schasicheila minuscula 540 



xanthia 540 



Schistocerca 462 



alutacea 156 



obscura 156 



shoshone 112, 156, 464 



vaga 112,463 



venusta 156, 464 



Schizopelma bicarinatum 195 



Schlerocheilus minutus 283 



pacificus 282 



Scion opsis palmata 274 



Seirpus cj-perinus 394 



lacustris 389, 395, 396 



olneyi 489 



pun gens, 379, 380, 385, 387-389, 

 391. 392. 394-397 



robustus 387, 388, 398 



Scolithus linearis 296, 297 



Scolopendrella 7 



