236 



INDEX 



Anodon biangulata (130) 

 exilis (129) 

 feminalis (130) 

 rostratus (128) 

 rugosus (127) 

 triangularis (128) 



Anodonta I2j 



angulata (130) 

 argentea (131) 

 arkansasensis (127) 

 beringiana 10, I2J 

 biangulata (130) 

 buchanensis (131) 

 cellensis (127) 

 cognata (128) 

 dallasiana (130) 

 denigrata (131) 

 edentula (127) 

 feminalis (130) 

 ferruginea (131) 

 ferussaciana (130) 

 flava (i29)_ 

 footiana (129), 129 

 fragilis (129) 

 gigantea (129) 

 glandulosa (129) 

 grandis I2g 

 housatonica (129) 

 implicata i2g 

 irisans (129) 

 kennerleyi 128 

 kennicotti /jo 

 lacustris (129) 

 laosensis (128) 

 lewisii (129) 

 marginata 128 

 marrjattiana (129) 

 modesta (131) 

 newtonensis (129) 

 nuttalliana 128 

 oblita (131) 

 oregonensis 128 

 ovata (129) 

 pallida (129) 

 pavonia (127) 

 pepiniana 130 

 plicata (131) 

 randalli (130) 

 rotundata (128) 



Anodonta rotundovata (128) 



salmonea (127), (129) 



shaefferiana (127) 



showalteri (127) 



eimpsoniana (130) 



subcarinata (129) 



subcylindracea (131) 



tetragona (127) 



triangularis (128) 



undulata (127) 



wahlamatensis 128 



vrardiana (127) 



youconensis (127) 



youkanensis (127) 

 Anodontoides 130 



ferussacianus 130 

 Ansulus (108) 

 Ansjius (108) 

 Aplecta (104), 106 

 Aplexa 100, 102, 104.^ 105, 107 



hordacea 103 



hypnorum 12, 104, 105, /0<J, 107 

 Aplexus (104) 



hypnorum 107 

 Arctonchis 112 



borealis 112 

 Arianta arbustorum 21 

 ArioHmax 34, 35, 47 



columbianus ^7, 48 



maculatus 48 



steindachneri ^5 



stramineus 48 

 Arion andersoni (46) 



foliolatus (47) 

 Arionidae 46 



Arionta ptychophora (25) 

 Armiger (Sj, 86 



crista 96 

 Arnouldia (40) 



fulva (41) 

 Aulaca (21) 

 Auricella (115) 

 Auricula (115) 

 Auricularia (60) 

 Auriculidse ii^ 

 Auriculina (115) 



Bathyomphalus 83, 86 

 Bifidaria 27 



