118 



INDEX. 



Cochliopa rowellii, 73 



Ctci'iupoma ru(jalosuin, 97 



Cycloiihoridaj. 95 



Cyclostuma cincinnatiensis, 82, 81, 97 

 dcntatuin, 96 

 Idpidurui, 94, 97 

 marffinalis, 97 

 marginatum, Gl 

 suyana, 81 

 tricarinata, 9, 97 



Cyclostominse, 95 



Dostia, 102 



Elea, 102 



Fluminicola, 89 

 Flumiuicola fusca, 92 



nuttalliana, 89 



vireus, 91 



Gillia, 73 

 Gillia altilis, 74 



cri'iiata, 75 



? 115 



Helicina, 107 

 Helicina umheliana, 109 

 castanea, 109 

 clirysocheila, 110 

 fastigiala, 111 

 hanleyaua, 110 

 minutn, 109 

 occulta, 111 



orbiculata, 108, 107, ]09 

 plic'ila. 111 

 ruhella, 112 

 suhdejiregsa, 111 

 subglobulosa, 110 

 tropica, 109 

 vestita, 109 



?116 



Heliciniilre, 107 

 Helix (lerisa, 59, 58 



decisa, Eaton, 42 

 dissirnills, 43, 42 

 fastigans, 111 

 hazard), 111 

 subcariii'ita, 58 

 subci/lindrica, 100 

 viridata, 62 

 vivipara, 24 

 Hjdrobiiiise, 67 



Lanistes, 2 

 J.eptoxis, 63 

 Leptoxis altilis, 75 

 crenata, 75 



Leptoxis fusca, 92 



Integra, 79 



isognna, 78 



nuttalliana, 90 



rapspformis, 70 



virens, 91 

 Lioplas, 55 

 Lioplax cyclostomatiformis, 56 



subcariiKita, 58 

 Limnsea decisa, 42, 41 



suhcarinata, 58 



vivipara, 23 

 Lgmnea eburnea, 45 

 Lymnida venlricosn, 45, 42 

 Lyogyrus, 14 



Marisa, 11 

 Meladomus, 2 

 Melania altilis, 75 



exigua, 72, 71 



injiata, 64 



Integra, 79 



isogona, 27 



hipidaria, 94 



ovularis, 46, 41 

 Mela:itho, 35, 114 

 Melautho coarctata, 52 

 decaiJipi, 114 

 decisa, 41 

 ponderosa, 36 

 Mltnda, 1U2 



Neripterou, 103 



Neritella, 101 



Neritella californica, 104 



cassiculum, 1('5 



jayana, 106 



picta, 105 



reclivata, 103, 101 



sliowalteri, 106 

 Neritidse, 100 

 Neritina, 102 

 Neritina californica, 105 



cassiculum, 105 



Jloridana, 104 



jayana, 107 



lineolata, 107 



picta, 105 



reclivata, 104 



showalteri, 106 



striata, 107 



se/)?-rt, 107 



-«>«5'> 107 



Oligyra, 108 

 Omphemis I a rust r is, 63 

 Omphemis plaioxis, 63 



