140 HELICID^. 



20. HELIX APPRESSA, SAT. 

 Plait XIII. 



H. testa depressa, imperforata, luteo-cornea ; anfractibus 

 oblique striatis ; apertura angusta ; labro albo, sub-dentato, 

 margine reflexo ; collumella dente unico arcuato armata. 



SYNONYMS AND EEFEKENCES. 



Hdix appressa, Say, Jouru. Acad. II. 154, anno 1S21. 



KiETLAND, Ohio Report, 172. 



BiNNEY, Boston Journ. III. 356, pi. 8. 



De Kay, New York Report, 31. 



Chemnitz Conch. 2d. ed. t. 63, f. 17, 18. 



Pfeiffee, Monog-. Helic. Viv. I. 317. 

 Helix linguifera, Lamarck, VI. 90, anno 1822. 



Fekussac, Prodr. 95 ; Hist. pi. 49, a. f. 3. 



Deshayes in Lajiaeck, VIII. 70. 

 Encyc. Meth. II. 224. 

 TrUlopsia appressa, Beck, Index, 22. 



DESCRIPTION. 



Animal. Uniform blackish slate color, and resem- 

 blmg in all respects the animal of Helix palliata. 



Shell depressed ; epidermis yellowish horn-color ; 

 whorls five, often somewhat angulated, -nith fine, dis- 

 tinct, transverse striaj ; aperture rather flattened, con- 

 tracted ; lip white, reflected, near the base appressed to 

 the body-whorl and covering the umbilicus, with one, or 

 two, or even no projecting teeth on its inner edge ; 

 pillar-lip with an oblique, compressed, white tooth ; base 

 convex ; umbilical region slightly indented. 



Greatest transverse diameter, less than three-fourths 

 of an inch. 



