MOLLUSCA OF OHIO. 381 
BRANCHIOPNEUSTA. 
AURICULIDA. 
Carychium exiguum (Say, Pupa). 
Over the state, common and variable. 
{Carychium exile H. C. Lea. 
Over the state; seems to be more on elevated and dry places 
than exiguum, although the two are found associated. 
PHYSID#. 
Physa ancillaria Say. 
Summit Co. 
{Physa ancillaria magnalacustris Walker. 
Lake Erie (St.,), t. Walker. 
Physa sayi Tappan. 
Meyer’s Lake, Canton (St.); ‘“Pippin Lake, Portage Co.,”’ 
from where the species was originally described. 
Physa heterostropha Say. 
Cincinnati; Cleveland (Allen); Tuscarawas Co.(St.); prob- 
ably over the state. 
Physa gyrina Say. 
Over the state, common and very variable. 
Physa gyrina elliptica Lea. 
Tuscarawas and Medina Counties (St.). 
Physa gyrina hildrethiana Lea. 
La Grange, Lorain Co. (Walker). 
Physa integra Say. 
Over the state, preferably in rivers and creeks. 
Physa anatina Lea. 
Tuscarawas river, and Nimishillen Creek, at Canton (St., 
t. Walker). May be a variety of integra. 
{Physa aplectoides Sterki. x 
Portage Co.! (Streator); Tuscarawas Co. (St.). Very small 
and slender; distinct, t. Walker. 
Aplexa hypnorum (Linneé, Bulla). 
Over the state; at some places out of water, on damp 
ground, e. g. Tuscarawas Co. (St.). 
LYMNAZ ID. 
Lymnea stagnalis Linné. Pal. 
Kent, Portage Co. (Dean). 
jLymnza megasoma Say. X 
Mahoning River at Alliance (St.) 
Lymnea palustris Miller, elodes Say. Pal. 
Over the state. 
