HELIX. 221 



67. HELIX MINUSCULA, BiNNET. 



Plate XVII. a. Figuke 2. 



H. testa minuta, orbiculato-depressa, umbilicata, albida ; 

 anfractibus quatuor, convexis ; apertura circulari ; labro 

 simplici, acuto. v» 



SYNONYMS AND SEFEEENCES. 



E£lix minuscula, Binney, Boston Journ. Nat. Hist. III. 435, pi. 22. f. 4. 



Adams, Vermont Mollusca, 11. 



Chemnitz, 2d ed. tab. 85, f. 20-23. 



Pfeiffee, Symbol. II. ; Monog. 1. 114. 

 Selix minutudma. Lea, Proceed. Am. Phil. Soe. No. 19. 



DESCRIPTION. 



Animal not observed. 



Shell. Minute, depressed-convex ; epidermis whit- 

 ish ; -whorls four, convex, not increasing rapidly in diam- 

 eter ; suture very distinctly impressed ; aperture nearly 

 circular ; lip thin, acute ; umbilicus large, not spread, 

 deep, and exhibiting the volutions ; base rounded, colum- 

 ella with a thin callus. 



Greatest transverse diameter less than one-eighth of 

 an inch. 



Geographical Distribution. Found in Ohio, on 

 the margins of streams, under chips or sticks in damp, 

 shaded situations, or under the bark of decaying stumps 

 near the surface of the waters, very common in the city 

 of Cincinnati, among grass in gardens. It is also found 

 rather abundantly in some parts of Vermont. Mr. Bart- 

 lett found it in Mississippi, Arkansas, and Florida. 

 VOL. 11. 56 



