INDEX TO MOLLUSCA OF NEW YORK 



Paludina lustrica, 2l\ 



porata, 20 5 . 



rufa, 24 1 . 

 Paludinidae, 23 s . 

 Pandora, 66*. 



trilineata, 66 s . 

 Patelloida alveus, 25". 



testudinalis, 25'. 

 Patula alternata, 33*. 



perspectiva, 34*. 



solitaria, 34*. 



striatella, 33 s , 34 1 . 

 Pec ten, 96 8 -Q7*. 



concentricus, 96 s . 



gibbus irradians, 96*. 



irradians, o6 9 . 



islandicus, 97*. 



magellanicus, 97 1 . 



tenuicostatus, 97 1 . 



turgidus, 96®. 

 Pectinibranchiata, 4 1 . 

 Pectinidae, 96 8 -97*. 

 Pelecypoda, 64*. 

 Petricola, 69 1 . 



dactylus, 69 1 . 



pholadiformis, 69*. 

 Petricolidae, 69 1 . 

 Phacoides, 78 s . 



filosus, 78 s . 

 Pharellinae, 65*. 

 Philine, 25 s . 



quadrata, 25*. 



quadratus, 25 s . 

 Philinidae, 25*. 

 Philomycus, 47 T . 



carolinensis, 47 T , 48 2 . 



dorsalis, 48*. 

 Pholadidae, 64'. 

 Pholadinae, 64*. 

 Pholas, 64 s . 



costata, 64 s . 



crispata, 64*. 



truncata, 64". 

 Physa, 56'. 



ancillaria, 57 1 . 



aurea, 57'. 



cylindrica, 57 1 . 



elliptica, 56". 



elongata, 53', 



glabra, 58 s . 



Physa gyrina, 56*. 



heterostropha, 57*, 58 1 . 



hildrethiana, 56*. 



hypnorum, 58 s . 



integra, 58 2 . 



niagarensis, 58*. 



obesa, 57 2 . 



planorbula, 59*. 



plicata, 57*. 

 Pisidium, 74*. 



abditum, 74 s , 74 s . 



aequilaterale, 75*, 76 1 . 



affine, 77'. 



compressum, 76'. 



ferrugineum, 76*. 



medianum, 77 s . 



notatum, 74°. 



noveboracense, 75 T . 



novi-eboracense, 75*. 



pauperculum, 77*. 



plenum, 74 T . 



punctatum, 77 s . 



resartum, 74 T . 



roperi, 77 s . 



rotundatum, 77 s . 



rubrum, 74 T . 



sargenti, 77'. 



sc'utellatum, 77 s . 



splendidulum, 77 s . 



streatori, 77 s . 



strengii, 77 2 . 



ultramontanum, 77*. 



variabile, 76 s . 



ventricosum, 75 T . 



virginicum, 75 1 . 



walkeri, 77*. 

 Plagiola, 85'. 



elegans, 85'. 

 Planorbinae, 58*. 

 Planorbis, 58". 



albus, 61 s . 



armigerus, 62 1 . 



bicarinatus, 60 2 . 



campanulatus, 58', 59 1 . 



corpulentus, 59 s . 



deflectus, 60 9 , 6l\ 



dilatatus, 61 8 . 



elevatus, 6i T . 



exacutns, 60*. 



hirsutus, 61 5 . 



