PRO. CONCH. SOC. GREAT BRITAIN AND IRELAND. 



127 



Pupa armifera — Say. 

 Pupa contracta — Say. 

 Pupa fallax — Say. 

 Succinea avara — Morse. 

 Succinea obliqua — Say. 

 Succinea ovalis — Gould. 



AURICULID^. 



Carychium exiguum — Say. 



LlMtiJElDM. 



Limnea desidiosa — Say. 

 Limnea reflexa — Say. 

 Physa heterostropha — Say. 

 P-lanorbis bicarinatus — Say. 

 Planorbis deflectus — Say. 

 Planorbis exacutus- — Say. 

 Planorbis parvus — Say. 

 Segmentina wheatleyi — Lea. 

 Ancylus fuscus — Adams. 



VALVATIDiE. 



Valvata tricarinata^ — Say. 



VIVIPARID^. 



Lioplax subcarinata — Say. 

 Melantho subsolida — 



Anthony. 

 Vivipara intertexta — Say. 



RISSOID^. 



Amnicola cincinnatiensis — 



Anthony. 

 x\mnicola porata — Say. 

 Bythinella obtusa — Lea. 



CORBICULADjE. 



SphseriuiTi sphsericum — 



Anthony. 

 Sphserium stamineum — 

 Sphserium transversum — 

 Pisidium compressum — 



Prime. 



UNIONID^. 



Anodonta edentula — Say. 

 Anodonta grandis — Say. 



Say 



Anodonta imbecilis — Say. 

 Anodonta suborbiculata — Say. 

 Margaritana complanata — 



Barnes. 

 Margaritana confragosa — Lea. 

 Margaritana rugosa — Barnes. 

 Unio sesopus — Green. 

 Unio alatus — Say. 

 Unio anodontoides — Lea. 

 Unio asperrimus — Lea. 

 Unio capax — Green. 

 Unio cornutus- — Barnes. 

 Unio crassidens — Lamarck. 

 Unio ebenus — Lea. 

 Unio elegans — Lea. 

 Unio ellipsis — Lea. 

 Unio gibbosus — Barnes. 

 Unio gracilis — Barnes. 

 Unio graniferus— Lea. 

 Unio laevissimus — Lea. 

 Unio ligamentinus — Lamarck. 

 Unio luteolus — Lamarck. 

 Unio metenevrus — 



Rafinesque. 

 Unio mississippiensis— Conrad. 

 Unio occidens — Lea. 

 Unio orbiculatus — Llildreth. 

 Unio parvus — Barnes. 

 Unio plicatus— Barnes. 

 Unio pustulatus — Lea. 

 Unio pustulosus — Lea. 

 Unio rectus— Lamarck. 

 Unio rubiginosus — Lea. 

 Unio securis — Lea. 

 Unio tenuissimus — Lea. 

 Unio trigonus — Lea. 

 Unio tuberculatus — Barnes. 

 Unio triangularis — Barnes. 

 Unio undulatus— Barnes. 

 Unio wardii — Lea. 

 Unio zigzag — Lea. 



