270 The Ohio Naturalist. [Vol. XIV, No. 5, 



OHIO MOLLUSCA. 



Additions and Corrections. 

 V. Sterki. 



Since the preliminary catalogue of the Ohio Mollusca was 

 pubHshed*, 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 insufhciently 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 

 com]Dlete 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 

 fonns 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. 

 (Bosc.) 



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 fomi. 



* Proc. Ohio State Acad. Sc, Vol. IV, Part 8, Special Papers No. 12, 

 1907. 



