204 



Index 



C'uniberlandiensis (Goiiiobasis) Trycn ... 157 



Cumingii (LithoglyphusJ Fifld 142 



Cuneata (Pleurobema) Raf 172 



("uneatus (Gnathodon) Gray 88 



Cupreonitens (Physa) Ckll 109 



Currieriana (Amnicola) Lea 143 



Currierianum (Pleurocera) Lea 152 



Currierianuni (Trypanostoma) Lea 152 



Currierianus (Somatogyrus) Lea 143 



Curta (Lithasia) Lea 149 



Curtatvim (Trypanostoma) Lea 152 



Curtisii (Truncilla) F. and LT 185 



Curtum (Pleurocera) Hald 153 



Cyclocalyx Dall 200 



Cygneus (Mytilus) L 57 



Cylindrica (Lithasia) Lea 150 



Cylindrica (Physa) Newc no 



Cylindrica (Quadrula) Say 166 



Cylindraceum (Pleurocera) Lea 152 



Cylindraceum (Trypanostoma) Lea 152 



Cylindricus (Unio) Say 44 



Cylindricus acrispatus (Unio) DeG i56 



Cylindricus propetypus (Unio) DeG 166 



Cymatocyclas Dall 200 



Cyphya (Obliquaria) Raf 171 



Cyprogenia Ag 65, 68, 179 



Cyrena Lam 85, 187 



Cyrenastrum Bgt i99 



Cy renella Desh 88, 1 90 



Cyrenellidre 39. 88, 190 



Cyrenidse 39. 85, 187 



Dalli (Amnicola) Call 14-2 



Dalli (Lyogyrus) P. and B 147 



Decampii (Goniobasis) Lea i57 



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



Decipiens (Somatogyrus) Walk 143 



Decisa flava (Campeloma) Cvirr 127 



Decisa melanostoma (Campeloma) Curr. . 127 



Decisum (Campeloma) Say 25, 127, 128 



Declivis (Planorbis) Sby 98 



Declivis (Planorbis) Tate ii--3 



Declivis (Segmentina) Tate 10; 



Decurambis Raf 178 



Deflectus (Planorbis) Say 98 



Deflexus (Planorbis) Sby 98 



Deformis (Physa) Curr 109, no 



Dehiscens orionopsis (Unio) DeG 175 



Depressa (Amnicola) Tryon 32 



Depressa (Ampullaria) Say 124 



Depressa (Obliquaria) Raf 179 



Depygis (Goniobasis) Say 36, 157 



Deserta (Amnicola) Pils 133 



Deshayesiana (Goniobasis) Lea 158 



Deviata (Truncilla) Anth 185 



Diaboli (Paludestrina) P. and F 137 



Diaphana (Ferrissia) Hald 19. i^o 



Diaphana (Physa) Tryon 108 



Diaphanus (Ancylus) Hald 120 



Digenae Simp 170 



Dilatata (Unio) Raf 17S 



Dilatatus (Planorbis) Gld 98 



Dilatatus pennsylvanicus (Planorbis) Pils. 59 



Distinguenda (Physa) Tryon 108, 109 



Dollabelloides (Pleurobema) Lea i73 



Donaciformis (Cyrena) Sby 187 



Donaciformis (Plagiola) Lea 179 



Donacopsis (Unio) DeG 185 



Dorbignyana (Physa) Lea 109, iio 



Downieana (Goniobasis) Lea 155 



Downiei (Anculosa) Lea 163 



Draparnaldi (Planorbis) Shepp 98 



Draparnaudi (Planorbis) Shepp 98 



Draytonii (Goniobasis) Lea 159 



Dreissensiidx 39, 84 



Dromas (Unio) Lea 68 



Dromus Simp 65, 68 



Dupontix (Cyrenoidea) Joan 88 



Duryi (Planorbis) Weth 99 



Duryi intercalaris (Planorbis) Pils 99 



Dysnomia Ag 80, 82, 186 



Ebenus (Quadrvila) Lea 



Edentulus (Strophitus) Say 56, 



Edentulus shaeflferianus (Strophitus) Lea . 



Edgarianum (Pleurobema) Lea 



Effusa (Pompholyx) Lea 14, 



Elatior (Ancylus) Anth 



Elatior (Rhodacmea) Anth 



Elegans (Amygdalonaias) Lea 



Elegans (Plagiola) Lea 70, 



Elegans elegantopsis (Unio) DeG 



Elegans magnelegans (Unio) DeG 



Elevatum (Pleurocera) Say 



Elevatus (Planorbis) C. B. Ads 



Elimia H. and A. Ads 



Elliottii (Lioplax) Lea 



Ellipsaria Raf 



Ellipsaria (Obliquaria) Raf 



Ellipsiformis (Lampsilis) Con 181, 



Ellipsis (Obovaria) Lea 



Ellipsis (Unio) Lea 



Elliptica (Physa) Lea 



106, 108, 109, IIO, 112, 



Elliptica minor (Physa) Grand 



Elliptica (Unio) Raf 



Elliptio Raf 43, 51, 



Elongata (Physa) Say 



Elongata arctica (Physa) Cless 



Elongatina (Physa) Lewis 



Emarginata (Amnicola) Kust 



Emarginata (Paludina) Kust 



Emeryensis (Goniobasis) Lea 



Epioblasma Raf 



Errans (Cyclas) Lewis 



Errans (Musculium) Lewis 



Erythropoma (Fluminicola) Pils 



Estabrookianum (Pleurobema) Lea 



Etowahensis (Goniobasis) Lea 



Eucosmius (Planorbis) Bartsch 



Eucosmius vaughani (Planorbis) Bartsch . 



Eugraptus (Ancylus) Pils 



Eulamellibranchia 39. 



Eupera Bgt 85 



•Eurycoelon Lea 34. 3^, 



Eurynia Raf 66, 76 



Euthyneura 5 



Exacutus (Planorbis) Say 



Exacutus rubellus (Planorbis) Sterki ... 

 Exacuous (Planorbis) Say 



167 

 176 

 176 

 172 

 105 

 1 22 

 122 



70 

 179 

 179 

 179 

 152 



98 

 149 

 129 

 177 

 179 

 1S5 



H5 

 1 10 

 172 



52 

 116 

 116 

 116 

 136 

 136 

 157 

 186 

 189 

 189 

 141 

 172 

 155 



99 



99 

 120 

 165 



87 

 149 

 ■ •?! 

 i 93 



99 

 102 



99 



