236 



Anodon biangulata (130) 

 exilis (129) 

 feminalis (130) 

 rostratus (128) 

 rugosus (127) 

 triangularis (128) 



Anodonta 121 



angulata (130) 

 argentea (131) 

 arkansasensis (127) 

 beringiana 10, I3J 

 biangulata (130) 

 buchanensis (131) 

 cellensis (127) 

 cognata (128) 

 dallasiana (130) 

 denigrata (131) 

 edentula {127) 

 feminalis (130) 

 ferruginea (131) 

 ferussaciana (130) 

 fiava (129) 

 footiana (129), 129 

 fragilis (129) 

 gigantea (129) 

 glandulosa (129) 

 grandis I2() 

 housatonica (129) 

 implicata I2g 

 irisans (129) 

 kennerleji 12S 

 kennicotti /JO 

 lacustris (129) 

 laosensis (128) 

 lewisii (129) 

 marginata 128 

 marryattiana (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) 



simpsoniana (130) 



subcarinata (129) 



subcylindracea (131) 



tetragona (127) 



triangularis (128) 



undulata (127) 



wahlamatensis 128 



■wardiana (127) 



youconensis (127) 



youkanensis (127) 

 Anodontoides 130 



ferussacianus l^o 

 Ansulus (108) 

 Ansjlus (108) 

 Aplecta (104), 106 

 Aplexa 100, 102, 104, 105, 107 



hordacea 103 



hypnorum I2, 104, 105, 106, 107 

 Aplexus (104) 



hypnorum 107 

 Arctonchis iia 



borealis 112 

 Arianta arbustorum 21 

 Ariolimax 34, 35, 47 



Columbian us ^7, 48 



maculatus 48 



steindachneri 4S 



stramineus 48 

 Arion andersoni (46) 



foliolatus {47) 

 Arionidse 46 



Arionta ptychophora (25) 

 Armiger S'j, 86 



crista 96 

 Arnouldia (40) 



fulva (41) 

 Aulaca (21) 

 Auricella (115) 

 Auricula (115) 

 Auricularia (60) 

 Auriculidae //y 

 Auriculina (115) 



Bathyompiialus 83, 86 

 Bifidaria 27 



