270 
The Ohio Naturalist. 
[Vol. XIV, No. 5, 
OHIO MOLLUSCA. 
Additions and Corrections. 
V. Sterki. 
Since the preliminary catalogue of the Ohio Mollusca was 
published*, a good deal of collecting has been done, principally 
in northern Ohio, by Dr. R. C. Rush, John A. Allen, Calvin Good¬ 
rich, and myself. The fauna of the southern part of the State is still 
very insufficiently known, outside of the vicinity of Cincinnati, 
and the Ohio River, and in that, mainly the naiades. It is desir¬ 
able that thorough, systematic collecting be done there, and also 
that at least one collection of the Ohio Mollusks be secured, as 
complete as possible, before it is too late. Then, a revised cata¬ 
logue may be prepared. 
Species and varieties added, up to the present time, are given 
in the following list, and also some alterations. A number of 
forms are doubtful; with more good material, their affinities may 
be ascertained. Additional localities of species enumerated in 
the catalogue, are noted only in a few instances. 
The Naiades have been carefully studied by Dr. A. E. Ortmann, 
during the last years, and their arrangement and nomenclature 
have been changed considerably. These changes cannot be in¬ 
cluded here. Additional species and varieties of Lymnaea, and 
some changes, are cited partly from Dr. Frank C. Baker’s mono¬ 
graph. The old generic name is retained. 
Gastrodonta lasmodon, (Phillips), from Rootstown, are G. sup- 
pressa Say; “G. suppressa,” from Tuscarawas Co., are of an 
undescribed species, known also from Virginia. 
Polygyra fastigiata (Say): Millville, Butler Co.! (t. Bryant 
Walker). 
Philomycus biseriatus Sterki: Summit Co.! (Dr. R. C. Rush), 
Tuscarawas Co. (St.); distinct, or a var. of carolinensis. 
(Bose.) 
Bifidaria armifera similis Sterki. Kelley’s Id.! (Allen). 
B. armifera affinis, Sterki: dunes at Fairport (St.); Hartwell, 
Cincinnati! (Goodrich). 
Vertigo pygmaea: (Draparnaud): Hudson, woods, and abundant 
in town lawns! (Rush). 
V. pygmaea albidens Sterki (changed from callosa, preoc.), Colum¬ 
bus. 
Succinea retusa magister Pilsbry. Lucas Co.! (Goodrich). 
Lymnaea stagnalis appressa Say is the typical American form. 
* Proc. Ohio State Acad. Sc., Vol. IV, Part S, Special Papers No. 12, 
1907. 
