222 HELICID^. 



Kemarks. This minute shell is but little larger than 

 S. pulchella, which it resembles on its upper surface. 

 It also bears some resemblance to small specimens of the 

 precedmg species. It has four full whorls, with deep 

 sutures ; is handsomely rounded ; has a circular aper- 

 ture, and a large umbilicus, which exhibits about two 

 volutions. Its striae of increase are too minute to be vis- 

 ible by the eye. It may be compared with H. saxicola, 

 which is a larger and coarser shell, with the outer whorl 

 somewhat carinate instead of cyhndrical, the aperture 

 more expanded, and the umbilicus less broad. 



58. HELIX FULIGINOSA. 



Plate XXXI. 



H. testa orbiculato-depressa, umbilicata, rufo-cornea ; 

 anfractibus Isevigatis, nitentibus ; apertura expansa, sub- 

 orbiculari ; umbilico profundo ; labro simplici, tenui, acuto. 



6TN0NYMS AND EEFEKENCES. 



Helta; fuliginoia, Gbiffith, MSS. 



KiKTLAND, Ohio Report, 173. 



Sager, Michigan Catalogue. 



BiNNEY, Boston Journ. Nat. Hist. III. 417, pi. 24. 



Adams, Vermont Mollusca, 11. 



De Kay, Nat. Hist. New York, 37, pi. 3, f. 22. 



Chemnitz, 2d ed. tab. 84, f. 1-3. 



Pfeiffer, Monog. Helie. Viv. I. 89. 

 Helix Icevigaia^ Feeussac, Tab. Syst. 45. 

 Helix cajiiliacea, Pfeiffer, SymbolEe, II. 24. 



DESCRIPTION. 



Animal nearly twice as long as the diameter of the 



