INDEX TO GENERA AND SPECIES 



New genera and species and the pages on which they are described are in 

 black-face type; synonyms in parenthesis; pages where synonymy of known 

 species or genera is given in italics; varietal names are treated as specific for 

 the purposes of the Index. 



Acanthinula 21 



aculeata 21 



harpa (22) 

 Acella (60), 64, 72 



kirtlandiana 72 

 AchatinidtE 33 

 Acmaea 113 

 Acroloxus 108, 109 

 Acroxus (108) 

 Adelina (60) 



elegans 60 

 Adula (82) 

 Agriolimax ^5 



agrestis ^^ 



berendti 46 



campestris 46 



hyperboreus 4^ 

 Alasmidonta costata (131 

 Alasmodon falcata {132) 



rhombica (127) 



yubaensis (132) 

 Alasmodonta arcuata (132) 



complanata (131) 



dahurica (132) 



rugosa (131) 

 Amalia 46 



gagates 46 



hewstoni ^6 

 Ameria loi 

 Amnicola 7/7 



cincinnatiensis 118 



emarginata 118 



granum (tiS) 



hindsii (119) 



lapidaria (119) 



limosa /// 



pallida /// 



porata (117) 



Amnicolidi /// 

 Amphibinajj 



avara 55 



pfeifferi 55 

 Amphibulima (55) 



ciiculata 55 



patula 55 

 Amphibulimus (55) 

 Amphibulina (55) 

 Amphipeplea 78 

 Araplexa (104) 

 Amplexis (22) 

 Amplexus (22), (104) 

 Ancieus (82) 

 Ancylastrum loS, 109 



cumingianns 108 

 Ancyllus (108) 

 Ancylus 11, loy, (108), 109 



caurinus (lio) 



cumingianus loS, 109 



fiuviatilis 107, 108, 109 



fragilis no 



fuscus 109 



kootaniensis no 



lacustris 107, 108, 109 



newberryi 109 



parallelus 1/0 



patelloides 109 



radiatus 108 



rivularis log, (lio) 

 Anguispira alternata (49) 



bruneri (52) 

 Angustula milium (32) 

 Anisopsis (81), 85 

 Anisus 81, (82), 84 

 Anodon areolatus (127) 



biangulata (130) 



cxilis (129) 



('57) 



