386 OHIO STATE ACADEMY OF SCIENCE, 
Goniobasis brevispira Anthony. 
Gambier, Knox Co. (Walker). 
Goniobasis exilis Haldeman. 
Scioto River (Walker). 
Goniobasis laqueata Say. 
‘“Ohio”’ (Walker). 
Other species (7) listed from Ohio: 
Gontobasts gibbosa Lea. 
Gontobasis haldemant Tryon. 
Gontobasts infantula Lea. 
Gontobasis lithasioides Lea (=var. of livescens?). 
Gontobasts ohioensts Lea. 
Lithasia obovata Say. 
Ohio River, up to Marietta (Call.) 
Angitrema verrucosum Rafinesque. 
Ohio River at Cincinnati. 
Anculosa costata Lea (=carinata Bruguiere?). 
Ohio River. 
Anculosa prerosa Say. 
Ohio River. 
Anculosa trilineata Say (=viridis Lea, syn. or var.?). 
Ohio River. 
RISSOID (s. lat., AMNICOLID# etc.). 
BITHYNIA TENTACULATA (Linné, Turbo). 
Lake Erie! (Streator); Ohio Canal in Stark Co. (St.). Intro- 
duced from Europe, and now widely distributed over 
various states. The central part of the operculum is 
distinctly spiral, not concentric! 
Somatogyrus subglobosus (Say, Paludina), zsogonus Say.* 
Over the state. A form from the Ohio River, at Cincinnati 
(St.), is rather different and may represent a variety. 
Somatogyrus integer (Say, Melania). 
Over the state, common. 
Pomatiopsis lapidaria (Say, Cyclostoma). 
Over the state, common; often far away from water. 
Pomatiopsis cincinnatiensis (Anthony, Cyclostoma). 
Cincinnati; Columbus. 
Amnicola limosa (Say, Paludina). 
Over the state, common and variable. 
Amnicola limosa porata Say. 
Meyer’s Lake at Canton (St.). 
Amnicola limosa parva Lea. 
New Philadelphia. 
*Some conchologists, e. g. F. C. Baker, regard S. isogonus as distinct 
from subglobosus. 
