174 The Ohio Journal of Science [Vol. XX, No. 6, 



were chalky (conf. the note on the Castalia shells). In Septem- 

 ber, 1912, the place was visited again and large numbers of 

 specimens were secured. 



List of Species. 



Zonitoides arboreus Say, very scarce. 



Vitrea indentata Say, one specimen. 



Pyramidula cronkheitei anthonyi Pilsbry, one. 



Polygyra profunda Say, one, found by Dr. Rush. 



Succinea ovalis Say, very scarce, and so are the two following: 



Succinea retusa Lea, and S. avara Say. 



Carychium exiguum Say, one. 



Lymnaea stagnalis appressa Say, rather scarce. 



Lymnaea (Acella) haldemani Deshayes, very scarce; two spec- 

 imens, partly broken. These are the only ones ever found 

 fossil, anywhere, so far as known. 



Lymnaea (Pseudosuccinea) columella Say, scarce. 



Lymnaea (Galba) humilis modicella Say, frequent. 



L. (Galba) humilis rustica Lea, rather scarce. 



Lymnaea (Galba) obrussa decampi Streng, common; not 

 typical, but probably of that form. This had not been seen 

 from Ohio, previously, either recent or fossil; but since 

 then. Dr. Rush has found it living in Summit County. 



Planorbis campanulatus Say, not common. 



Planorbis trivolvis binneyi Tryon, scarce. 



Planorbis exacutus Say, not common, mostly broken or young. 



Planorbis rubellus Sterki, rather scarce. 



Planorbis crista Linnaeus, scarce. 



Planorbis parvus Say, common; adult specimens have the 

 peristome markedly expanded ; some are of a more peculiar 

 form: whorls higher and with the outer slope steep. Many 

 are variously deformed. One form has the whorls narrower 

 and more slowly increasing, like those from Castalia. 



Planorbis albus Muller, common; the last whorl is strongly 

 descending towards the aperture in most specimens. 

 (P. hirsutiis Gould is probably not distinct from albus). 



Ancylus kirklandi Walker, form, rather scarce. 



Ancylus parallelus Haldeman, scarce. 



Ancylus pumilus Sterki, scarce. 



There are apparently some other species of Ancylus but the 

 specimens were not sufficient for identification; more good 

 material is desirable. 



