INDEX. 



GGl 



Pag. 



Vfi'l(l'eria inicans S7 



Najas 328 



Physellu Pfr 49 



Derendti 49 



Pit.h;is Pease vid. Pitijs: 



Pilijs Beck. Pease sect.Helicis. 



analojica 257 



■ Atiensis 165 



bilamellata 260 



bursatella 255. 567 



• canalis 547 



capillata 197 



cavernnla 568 



celsa 261 



complementaria 164 



consimilis 262 



contorta 256 



daedalea 258 



clecempiicata 260 



decorticata ' 542 



decussatula 261 



fUocostata 261 



fratercula 253 



gradata 164 



Grdffii 259 



Harveyensis 542 



Heyneinanni 255 



hystricella 258 



Injstricelloides 258 



hystrix 261 



imperforata 256 



Jacquinoti 255 



jiigosa 260 



Maiipitiensis 481 



modicella 149 



inuUilamellata 569 



occanica 203 



oparica 259 



Otareae 543 



parvidens 257 



paucicostata 261 



proxima 543 



radiella 162 



retunsa 256 



Roratongensis 257 



• roteUina 262 



rotula 69 



rudis 547 



sexlamellata 259 



slellula 260 



• taneae 482 



tenuicoslata 547 



lumuloides 567 



rerecunda 257 



Pog. 



Pilys Youngi 54 3 



Plagioplycha Pfr 49 



Planispira Beck 49 



Planogyra Morse 49 



asteriscus 189 



Plebecula Loioe 49 



Plectopylis Bens. subg. He- 



licis. 



achatina 451 



cyclaspis 466 



pettos 4 49 



Shanensis 481 



(vid. vol. VIII.) 

 Plcctolropis Mart. secl. He- 

 licis. 



squarrosa 184 



Polydontes imperator Mtf. 363 



Polygyra Say 49 



anilis 476 



— — Carpenteriana 469 



cereolus 469 



Febigeri 468 



lens 576 



plagioglossa 471 



plicala 592 



poIygyreUa 253 



septemvolva 469 



Troosdana 592 



volvoxis 469 



Poly gyrella Bland 50 



Polymita Beck 49 



■* areolala 226 



intercisa 406 



levis 229 



Pandorae 229 



redeinita 407 



Tryoni 405 



varians 272 



Pomat ia Leach 49 



antiquoruin 271 



aspersa 322 



Gussoneana var 269 



secernenda 266 



Proserpina discoidea 68 



opalina 253 



Pseudohy alina Morse 49 



conspecta 170 



exigua 17 4 



iiicrustata 169 



liinatula 155 



Mazatlaiiica 169 



milliuin 156 



minuscula 154 



Punclum Morsc sect. Heiicis. 



