152 The Ohio Journal of Scieftce [Vol. XXI, No. 5, 



of vegetation suitable for pond species, but also because among 

 the fishes which were present, were some which would feed on 

 snails, (Baker '16). 



Kinds of snails were rather few, but the group as a whole, 

 because of good numbers among some species, was fairly 

 prominent. 



Dr. Sterki named quite a few specimens with a reservation 

 but the writer includes definitely all specimens identified, in 

 the species he referred them to. The numbers in *the tables 

 give very little idea of the total. Only a portion of all collected 

 were identified. 



Family LymnceidcE. 



Lymnaea obrussa Say. Only a few of the identified lot of 

 Lymn^a were of this species, and probably it was rare. Spec- 

 imens were practically full grown. 



Lymnaea humilis Say. This was the common member of the 

 genus; four-fifths of the identified Lymnaea were of this species. 

 In comparison with the more numerous Physa, it could at 

 best be called fairly common. 



Lymnsea humilis rustica Lea (?) This was represented by 

 a single specimen. Unquestionably it was rare. 



Lymnaea humilis modicella was represented by two spec- 

 imens; also rare. 



Lymnaea parva Lea. (?) Only one specimen and doubtfully 

 that, was found of this species. 



Family PhysidcB. 



Physa gyrina Say. This well known species proved to be 

 common, somewhat more so than Lymneea humilis, judging 

 from identified material. It was found at practically all stations 

 in the small pond. 



Physa heterostropha Say. This was the most abundant 

 species of snail present. About three times as many were 

 obtained as of P. gyrina, and they were secured at all stations 

 in the small pond. 



Physa Integra Haldeman. Relatively few specimens were 

 found and this species must be ranked as rather uncommon. 



Vallonia pulchella Muller. A specimen of this purely terrestrial 

 snail was accidentally in the water at station 11. 



