384 OHIO STATE ACADEMY OF SCIENCE. 
Ancylus tardus Say. 
Cincinnati; Tuscarawas Co. (St.). Probably over the state. 
Ancylus rivularis Say. 
Cincinnati; Cuyahoga River (Allen); Tuscarawas Co. (St.). 
tAncylus sterkii Walker, MS. 
Tuscarawas River, common; Maumee River (St.). [Shell 
rather small, slender, with the apex decidedly posterior, 
near the right margin, and markedly oblique. ] 
Ancylus shimeki Pilsbry. 
Tuscarawas Co: (t,): 
tAncylus pumilus Sterki. 
Tuscarawas River (types), Miami Canal at Hamilton (St.). 
{+Gundlachia —-_—-’ meekiana Stimpson. 
Pools near New Philadelphia (St.). Thornburg, Cuyahoga 
Co., on Nuphar leaves in a slough on the Cuyahoga 
River (Allen), may be of another species. 
*Gundlachia ? sp. X 
Tuscarawas Rixer at New Philadelphia (St.). [The same has 
been seen from Indiana; very small, 2 mill. long, and of 
a shape quite different from other Gundalchia; may 
represent a distinct genus. ] 
PROSOBRANCHIATA. 
HELICINIDA. 
Helicina occulta (Say, Helix), has been cited, but I have seen 
no specimens. 
VIVIPARIDA. 
Campeloma ponderosum (Say, Paludina). 
Ohio River. 
Campeloma subsolidum (Anthony, Paludina.) 
‘“Ohio, northern part;’’ Ohio Canal near Cleveland (Allen). 
Campeloma integrum (Say, Paludina). 
Over the state, common. Regarded as a variety of decisum, 
by some conchologists. 
Campeloma integrum obesum Lewis. 
Cincinnati; Miami Canal at Middletown, Ohio Canal at 
Columbus; Hudson, Summit Co. (Walker). 
Campeloma decisum (Say, Lymnza, Paludina). 
Lake Erie and tributaries; Mahoning River, Miami River, 
Miami Canal (Walker). 
Campeloma decisum fecundum Lewis. 
Ohio Canal at Columbus, Miami Canal at Cincinnati(Walker) 
