228 LIMNAEACEA. 



Family LIMNAEACEA, Mke. 

 Genus PHYSA, Drap. 



1. Physa heterostropha, Sow. 



8 Prince Edward's I. ; coll. A. Nevill, Esq. 



12 Ohio, Delaware and New York ; ex c. Prof. W. Newcomb and Kev. E. 

 R. Beadle, and As. Soc., Bengal. 



2. Physa ancillaria, Say. 



5 New York ; ex c. Prof. W. Newcomb. 



3. Physa gyrina, Say. 



5 Michigan ; ex c. Rev. E. R. Beadle. 



(? distinct species). 



9 California and Oregon ; ex c. Prof. W. Newcoinb. 



4. Physa carltoni, Lea. 



1 California ; ex c. Prof. E. C. Stearns. 



5. Physa adelina, Tryon. 



3 California j ex c. Prof. W. Newcomb. 



6. Physa gabbi, Tryon. 



2 California -, ex c. Prof. E. C. Stearns. 



7. Physa cooperi, Tryon. 



3 Oregon ; ex c. Prof. W. Newcomb. 



8. Physa humerosa, Gould. 



2 Deserts of California ; (semifossil) ; ex c. Prof. W. Newcomb. 



9. Physa costata, 



1 Clear Lake, California ; ex c. Prof. W. Newcomb. 



10. Physa diaphana, Tryon. 



5 Saineda County, California ; ex c. Prof. E. C. Stearns. 



11. Physa proxima, Tryon. 



1 California ; ex c. Prof. W. Newcomb. 



12. Physa propinqua, Tryon. 



2 California ; ex c. Prof. W. Newcomb. 



