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NEW YORK STATE MUSEUM 



Planorbis lentus, 59, 6O 1 . 



megastoma, 59. 



obliquus, 6o 9 . 



parvus, 6i 7 , 62*. 



trivolvis, 59*. 

 lentus, 59 9 . 



Planorbula armigera, 62*. 

 Pleurocera, 15*. 



elevatum, 16*. 



intensum, 15. 



pallidum, 16*. 



subulare, 15*. 



intensum, 15*. 

 Pleurotoma bicarinata, 7". 



bicarinatum, f. 



cerinum, 8 s . 



decussata, 7*. 



plicata, 7 9 . 

 Podopthalma, 24*. 

 Polygyra, 35'. 



albolabris, 36. 

 dentata, 37 1 . 



appressa, 38*. 



clausa, 39*. 



dentifera, 37 7 . 



elevata, 38". 



exoleta, 37'. 



fraudulenta, 35 T . 



hirsuta, 39*. 



inflecta, 35', 36'. 



juxtidens, 35". 



leai, 40*. 



mono don, 39", 40*. 

 fraterna, 40*. 



multilineata, 37*. 



palliata, 37, 38'. 



pennsylvanica, 38 T . 



profunda, 36*. 



sayi, 36*. 



thyroides, 38', 39*. 



tridentata, 35*. 



juxtidens, 35'. 

 Polyplacophora, 63*. 

 Pomatiopsinae, 22*. 

 Pomatiopsis, 22 5 . 



lapidaria, 22*. 



lustrica, 2i 5 . 

 Psammobia fusca, 68 5 . 

 Pseudohyalina limatula, 30*. 



minuscula, 30*. 



Ptychobranchus, 85*. 



phaseolus, 85*. 

 Pulmonata, 27*. 

 Punctum, 32 7 . 



minutissimum, 32*. 



pygmaeum, 32 T . 

 Puncturella, 25*. 



noachina, 25 s . 

 Pupa, 42 1 . 



armifera, 45", 46 1 . 



badia, 42 1 . 



contracta, 45*. 



corticaria, 44 7 . 



fallax, 4i 7 . 



gouldii, 43*. 



milium, 43, 44*. 



modesta, 43*. 



muscorum, 42 1 . 



ovata, 42'. 



pentodon, 46*. 



rupicola, 45*. 



simplex, 33 1 . 

 Pupidae, 41. 

 Pupilla badia, 42*. 



muscorum, 42*. 



pentodon, 46". 

 Pupoides, 4i 6 . 



. marginatus, 4i 7 . 

 Purpura, 4. 



bizonalis, 4 7 . 



imbricata, 4 7 . 



lapillus, 4. 

 Purpurinae, 4*. 

 Pyramidula, 33*. 



alternata, 33*. 



perspectiva, 34". 



solitaria, 34 a . 



striatella, 33", 34'. 

 Pyrula, aruana, 5*. 



canaliculata, 5. 



carica, 5 7 . 



Quadrula, 93*. 

 coccinea, 94*. 



paupercula, 94*. 

 lachrymosa, 93*. 

 plicata hippopaea, 93*. 

 pustulosa, 93*. 

 rubiginosa, 93*. 

 sol id a, 94 4 . 



