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 



harp a (22) 

 Acella (60), 64, 72 



kirtlandiana 72 

 Achatinidz 33 

 Acmaea 113 

 Acroloxus 108, 109 

 Acroxus (108) 

 Adelina (60) 



elegans 60 

 Adula (82) 

 Agriolimax 4.5 



agrestis 45 



berendti 46 



campestris 46 



hyperboreus 45 

 Alasmidonta costata (131 

 Alasmodon falcata (132) 



rhombica (127) 



yubaensis (132) 

 Alasmodonta arcuata (132) 



complanata (131) 



dahurica (132) 



rugosa (131) 

 Amalia 46 



gagates 46 



hewstoni 46 

 Ameria 101 

 Amnicola 7/7 



cincinnatiensis llB 



emarginata nB 



granum (118) 



hindsii (119) 



lapidaria (119) 



limosa 777 



pallida 777 



porata (117) 



Amnicolidae 777 

 Amphibina jj 



avara 55 



pfeifferi 55 

 Amphibulima (55) 



cuculata 55 



patula 55 



Amphibulimus (55) 

 Amphibulina (55) 

 Amphipeplea 78 

 Amplexa (104) 

 Amplexis (22) 

 Amplexus (22), (104) 

 Anczus (82) 

 Ancylastrum fo8, 109 



cumingianus 108 

 Ancyllus (108) 

 Ancylus n, 707, (108), 109 



caurinus (no) 



cumingianus 108, 109 



fiuviatilis 107, 108, 109 



fragilis no 



fuscus 109 



kootaniensis 77O 



lacustris 107, 108, 109 



newberryi 109 



parallelus 770 



patelloides 109 



radiatus 108 



rivularis 709, (no) 

 Anguispira alternata (49) 



bruneri (52) 

 Angustula milium (32) 

 Anisopsis (8l), 85 

 Anisus 81, (82;, 84 

 Anodon areolatus (127) 



biangulata (130) 



exilis (129) 



(157) 



