242 HELICID^E. 



been sent to us, also, which were said to have been pro- 

 cured in Georgia. 



70. HELIX INDENTATA, SAY. 

 PLATE XXIX. FIGURE 2. 



H. testa minima, depressa; convexiuscula, imperforata, 

 tenuissima, diaphana, nitida ; ultimo anfractu lineis im- 

 pressis, distantibus, radiatis ornato ; apertura transversa ; 

 labro simplici, acuto ; basi indentato. 



SYNONYMS AND REFERENCES. 



Helix indentata, SAY, Journ. Acad. II. 372. 

 KIRTLAND, Ohio Report, 173. 



BINNEY, Boston Journ. Nat. Hist. III. 415, pi. 22, f. 3. 

 DE KAY, Nat. Hist. New York, 31, pi. 3, f. 26. 

 GOULD, Invertebrata, 181, f. 109. 

 ADAMS, Vermont Mollusca, 10. 

 CHEMNITZ, 2d. ed. t. 34, f. 12 - 15. 

 PFEIFFER, Monog. Helic. Viv. I. 59. 



DESCRIPTION. 



ANIMAL bluish-black upon the upper parts ; margin 

 and posterior extremity lighter. 



SHELL flattened, thin, pellucid ; epidermis highly pol- 

 ished, corneous, whorls rather more than four, rapidly 

 enlarging, with regular, sub-equidistant, radiating, im- 

 pressed lines, which on the body-whorl extend to the 

 centre of the base, outer whorl expanding towards the 

 aperture ; suture well impressed ; aperture rather large, 

 transverse ; lip simple, very thin, at its inferior extremity 

 terminating at the centre of the base of the shell ; um- 

 bilicus none, but the umbilical region is indented. 



