204 



Index 



Cumberlandiensis (Goniobasis) Trycn . . . 157 



Cumingii (Lithoglyphus) Frfld. 142 



Cuneata (Pleurobema) Raf 172 



Cuneatus (Gnathodon) Gray 88 



Cupreonitens (Physa) Ckll 109 



Currieriana (Amnicola) Lea 143 



Currierianum (Pleurocera) Lea 1^2 



Currierianum (Trypanostoma) Lea 152 



Cwrrierianus (Somatogyrus) Lea 143 



Curta (Lithasia) Lea 149 



Curtatum (Trypanostoma) Lea 152 



Curtisii (Truncilla) F. and U 185 



Curtum (Pleurocera) Hald 153 



Cycfocalyx Dall 200 



Cygneus (Mytilus) L 57 



Cylindrica (Lithasia) Lea 150 



Cylindrica (Physa) Newc 110 



Cylindrica (Quadrula) Say 1:66 



Cylindraceum (Pleurocera) Lea 152 



Cylindraceum (Trypanostoma) Lea 152 



Cylindricus (Unio) Say 44 



Cylindricus acrispatus (Unio) DeG 166 



Cylindricus propetypus (Unio) DeG 166 



Cymatocyclas Dall 200 



Cyphya (Obliquaria) Raf 171 



Cyprogenia Ag 65, 68, 179 



Cyrena Lam 85, 187 



Cyrenastrum Bgt 199 



Cyrenella Desh 88, 190 



Cyrenellidae 39, 88, 190 



Cyrenidae 39, 85, 187 



Dalli (Amnicola) Call 142 



Dalli (Lyogyrus) P. and B 147 



Decampii (Goniobasis) Lea 157 



Decampii (Melantho) W. G. Binn. ..128, 129 



Decipiens (Somatogyrus) Walk 143 



Decisa flava (Campeloma) Curr 127 



Decisa melanostoma (Campeloma) Curr. . 127 



Decisum (Campeloma) Say 25, 127, 128 



Declivis (Planorbis) Shy 98 



Declivis (Planorbis) Tate 103 



Declivis (Segmentina) Tate 10; 



Decurambis Raf 178 



Deflectus (Planorbis) Say 98 



Deflexus (Planorbis) Sby 98 



Deformis (Physa) Curr 109, mo 



Dehiscens oripnopsis (Unio) DeG 175 



Depressa (Amnicola) Tryon 32 



Depressa (Ampullaria) Say 124 



Depressa (Obliquaria) Raf 179 



Depygis (Goniobasis) Say 36, 157 



Deserta (Amnicola) Pils 153 



Deshayesiana (Goniobasis) Lea 158 



Deviata (Truncilla) Anth 185 



Diaboli (Paludestrina) P. and F 137 



Diaphana (Ferrissia) Hald 19, 120 



Diaphana (Physa) Tryon 108 



Diaphanus (Ancylus) Hald 120 



Digenae Simp 170 



Dilatata (Unio) Raf 175 



Dilatatus (Planorbis) Gld 98 



Dilatatus pennsylvanicus (Planorbis) Pils. 99 



Distinguenda (Physa) Tryon 108, 109 



Dollabelloides (Pleurobema) Lea 173 



Donaciformis (Cyrena) Sby 187 



Donaciformis (Plagiola) Lea 179 



Donacopsis (Unio) DeG 185 



Dorbignyana (Physa) Lea ..109, 110 



Downieana (Goniobasis) Lea 155 



Downiei (Anculosa) Lea 163 



Draparnaldi (Planorbis) Shepp 98 



Draparnaudi (Planorbis) Shepp 98 



Draytonii (Goniobasis) Lea 159 



DreissensiidK 39, 84 



Dromas (Unio) Lea 68 



Dromus Simp 65, 68 



Dupontiae (Cyrenoidea) Joan 88 



Duryi (Planorbis) Weth 99 



Duryi intercalaris (Planorbis) Pils 99 



Dysnomia Ag 80, 82, 186 



Ebenus (Quadrula) Lea 167 



Edentulus (Strophitus) Say 56, 176 



Edentulus shsefiferianus (Strophitus) Lea . 176 



Edgarianum (Pleurobema) Lea 172 



Effusa (Pompholyx) Lea 14, 105 



Elatior (Ancylus) Anth 122 



Elatior (Rhodacmea) Anth 122 



Elegans (Amygdalonaias) Lea 70 



Elegans (Plagiola) Lea 70, 1 79 



Elegans elegantopsis (Unio) DeG 179 



Elegans magnelegans (Unio) DeG 179 



Elevatum (Pleurocera) Say 152 



Elevatus (Planorbis) C. B. Ads 98 



Elimia H. and A. Ads 149 



Elliottii (Lioplax) Lea 129 



Ellipsaria Raf 177 



Ellipsaria (Obliquaria) Raf 179 



Ellipsiformis (Lampsilis) Con 181, tSs 



Ellipsis (Obovaria) Lea 180 



Ellipsis (Unio) Lea 75 



Elliptica (Physa) Lea 



106, 108, 109, no, 112, 115 



Elliptica minor (Physa) Grand no 



Elliptica (Unio) Raf 172 



Elliptio Raf 43, 51, 52 



Elongata (Physa) Say 116 



Elongata arctica (Physa) Cless 116 



Elongatina (Physa) Lewis 116 



Emarginata (Amnicola) Kust 136 



Emarginata (Paludina) Kust 136 



Emeryensis (Goniobasis) Lea 157 



Epioblasma Raf 186 



Errans (Cyclas) Lewis 189 



Errans (Musculium) Lewis 189 



Erythropoma (Fluminicola) Pils 141 



Estabrookianum (Pleurobema) Lea 172 



Etowahensis (Goniobasis) Lea 155 



Eucosmius (Planorbis) Bartsch 99 



Eucosmius vaughani (Planorbis) Bartsch . 99 



Eugraptus (Ancylus) Pils 120 



Eulamellibranchia 39, 165 



,Eupera Bgt 85, 87 



Euryccelon Lea 34, 36, 149 



Eurynia Raf 66, 76, 77 



Euthyneura 5, 93 



Exacutus (Planorbis) Say 99 



Exacutus rubellus (Planorbis) Sterki . . . 102 

 Exacuous (Planorbis) Say 99 



