230 



culars. The upper and lower surface are both more flat- 

 tened, and the outline is a more perfect circle. The num- 

 ber of whorls, in specimens of the same size, is greater 

 by nearly one volution. The surface of the whorls is less 

 rounded ; the last whorl expands but very little towards 

 the aperture ; the base is broader, less indented, and 

 very flat ; the umbilicus is rounder, and better defined ; 

 and the aperture is not thickened within, by a white, 

 testaceous deposit. 



I have seen but two specimens, which were brought 

 from Tennessee by Mr. S. S. Haldeman. 



62. HELIX CELL.ARIA, MtJLLER. 



PLATE XXIX. FIGUEE 4. 



H. testa orbiculato-depressa, umbilicata, tenui, pellucida, 

 nitida, supra pallide cornea, subtus lactea ; anfractibus quin- 

 que ; labro simplici, acuto ; basi intus incrassato. 



SYNONYMS AND REFERENCES. 



Helix cellaria, MULLER, Verm. No. 230. 



BINNEY, Boston Journ. Nat. Hist. III. 421. 



GOULD, Invertebrata, ISO, f. 104. 



PFEIFFER, Monog. Helic. Viv. I. 111. 

 Helix glapUyra, SAY, Nich. Encyc. IV. pi. 1, f. 3. 



DE KAY, Nat. Hist. New York, 37, pi. 3, f. 25. 

 Helix nitida, DRAPARNAUD, 117, pi. 8, f. 23 to 25. 



DESCRIPTION. 



ANIMAL. Upper surface light indigo blue, darkest 

 on the head, neck, and tentaculre, collar greenish, eyes 

 black. Foot narrow and slender, not much exceeding in 

 length the diameter of the shell, terminating acutely. 



