HELIX. 191 



42. HELIX TEXASIANA, Moeicand. 



Plate XLV. Figure 1. 



H. testa orbiculato-dcpressa, cornea, supcrne planulata, 

 sulcato-striata, ad peripheriaiti angulata, inferne convexa, 

 glabra, nitida, arete perforata ; anfractibus quinis, ultimo 

 deflecto, pone labro albo reflexo constricto; apertura co- 

 arctato-lunari, labro inferne bidentato, extremitatibus lamelii 

 angulata ad collumellam adnata coadunatis. 



SYNONYMS AND REFERENCES. 



Helix Hxasiana, Moeicand, Mem. Genev. VI. 538, pi. 1, f. 2. 



Deshayes, ed. Lamarck, VIII. 133. 



Fekussac, Hist, des Moll. pi. 09, D. f. 2. 

 Hdix auriculata, Binney, Buston Journ. Nat. Hist. III. 387. 



DESCKIPTION. 



Animal brownish, or dingy white ; tentacles darker, 

 sheaths visible by a dark line, superior tentacles much 

 enlarged at tip. 



Shell depressed, orbicular, rather sohd, of a pale 

 horn color, with crowded rib-strise above, smooth, or 

 famtlj striated, and shining beneath. Spire nearly flat, 

 of five whorls separated by a well-marked sutui-e, the 

 outer one obtusely angular at periphery, nearly at the 

 plane of the sjiire, and somewhat deflected near the 

 aperture. Beneath conve.xly rounded, with a somewhat 

 distorted appearance in consequence of the whorl becom- 

 ing narrower, rather than broader, towards the aperture, 

 leaving a minute umbilical perforation. Aperture nar- 



