datklo^iie of tl]e jMoUti^ca of l\liode Ivslaiid, 



BY HORACE F. CARPENTER. 



January 1, 1873. 



PART SECOND.— THE FLUVIATILE MOLLUSCA. 



The Fluviatile Mollusca of Rhode Island, consist of two classes, containing 2 Sub- 

 classes, 3 Orders, 2 Sub-Orders, 9 Families, 4 Sub-Families, 21 Genera, and 39 Species, 

 namely : 



Class Gasteropoda. Sub-Class Pulmonifera. Order Pulmonata. 



Sub-Order. Family. Sub-Family. Genera. Species. 



ijininii'miT . . ^ XerisUmia toluiiHflia, Say. (varcluilybca, OM.) niacroslomay^ii.v. 



I Tji'nii:i>i(:lil! . . ■[ | Planorbis leiitus, Siii/. 



Hclisoina l)icarinaliis. Sny. 



I I'laiKirliulla. . . .campanulaliis, .Sill/. 



I I'laiioi'hiiia' . -, Mciictus <'Xacutiis, Siiy. 



j I 1' 1 t ilt'Hfclus, 6V/V. & var. virens, -4(/rt(«.«. dilatatiis, t'ci/W. 



Limnnplula. ^ (.yraulus . . -^ ,,.,^^,„„,_ ^ ;,,,/ p,^^^.„^_ ,^,^^ 



' I Planorbula. . . .armigera, Say. 



Ancylida! AncyUis fuscus, Adam.i paralleliis. Haiti. 



Pi.vQiflT (>i.ic;„.,. * Pbysa ancillaria, .Si.y. heU-rostropba. Sii/. 



[ ^"J*'""- 1 ".V^"'-i ■■•■-, Biiliinis el.mgatus, St-y. 



Sub-Class Dioeea. Order Pectinibranchiata. 



I V„K«iu1* * Tropidina tricarinata, S<iy. 



I ^ "'^''""* ■, l,y„gyius pupoideus, out. 



T.Tiiioi^iossa. •' Viviparidae (aiiipelonia. . .ilccisa,Say. 



I Amnieolidai. . . AuinicoliniL".. . Amnicola liraosa. Say. 



I Pomatiopsida; Pouiatiopsi.s. . . Hrownii, H F. Carpenter, novi'iii sp. 



Class Acephala. 



Order. Family. Genera. Species. 



f,, ,.| • ...laH'P * ^P'"'^'^'""" parHiiiieium, iiu.y. rbomboideum, ^v/.y. wcaris, Prime, .similis, .S((^ 



, <.oi iRUiaoiB-^ Pisidiiim abdiumi, llaUl ' variabilc, }'rime. Virginicum, Boitrgn. 



Dinivatia . 



I ( Unio complanatus, Solander. nasulus, Say. radialus, Gmelin. 



I UnionidiC, . . -J Alasmodon. . . .marginata, Say. undulata, Say. arcuata, Darnc.i 

 { Anodon cataracta, Say. implicata, Say. undulata, Say. 



