2 3 8 



Corneocyclas abyssorum 143 



aequilateralis 141 



arctica 144 



borealis 144 



compressa 142 



glacialis 144 



henslowana 143 



idahoensis 141 



nivalis 144 



occidentalis 143 



pulchella 144 



randolphi 144 



rotundata 143 



scutellata 141 



sibirica 144 



steenbuchii 143 



ultramontana 144 



variabilis 142 



ventricosa 143 



virginica 141 

 Cornu (81) 

 Coryne 183 



brachiata 177, 183, 210 



eximia (184) 

 Costatella (100), 101 

 Costella (100) 

 Cotulina polyzonias (201) 



tricuspidata (201) 

 Cumingia (108) 

 Cyclas appendiculata (145) 



aurea(i35) 



bulbosa 136 



calyculata 140 



dentata (137) 



dubia (141) 



elegans (136) 



emarginata (138) 



fabalis (137) 



flava (138) 



fuscata 136 



jayensis (139) 



lenticula 140 



media (140) 



nobilis (137) 



ovalis (137) 



partumeia (139) 



patella (138) 



pulchella (144) 



rhomboida (136) 



INDEX 



Cyclas saratogea (135) 



slmilis (134) 



solidula (136) 



stagnicola (140) 



staminea (136) 



steenbuchii (143) 



striatina (135) 



sulcata (134) 



tenuis 139 



transversa (139) 



truncata (140) 

 Cyclocalyx 143 

 Cyclolimnaea 64 

 Cyclostoma lapidaria (119) 



tricarinata (121) 

 Cymatocyclas compressa 142 



Dall, W. H., land and fresh water 



mollusks 1-171 

 Dentati 97 

 Dentatus (97) 

 Diastropha (99) 

 contorta 100 

 Diplodiscus (82), 85, 86 

 Discoidina (83) 

 Discus (97) 

 Drepanotrema 82, 86 



Endodontidae 49 

 Enydra (99) 

 Epiphragmophora 21 



fidelis 21 

 Erinna (61), 62, 65 



newcombi 61, 65 

 Euconulus jp, 40, 45 



fabricii 41, 42 



fulva 42 



fulvus 39, (40), (41) 



trochiformis 40, 41, 42 

 Eucopella campanularia (188) 

 Eudendrium annulatum 186 



bacciferum (184) 



pygmanim 186 



vaginatum 177, 182, 185, 212 

 Euhadra fiscina II 

 Eulimneus (61) 

 Eulota fiscina 11 



flexibili.s II 



weyrichi n 



