HELIX. 



42. HELIX TEXASIANA, MORICAND. 



PLATE XLV. FIGURE 1. 



H. testa orbiculato-depressa, cornea, superne planulata, 

 sulcato-striata, ad peripheriam angulata, inferno convexa, 

 glabra, nitida, arete perforata ; anfractibus quinis, ultimo 

 deflecto, pone labro albo reflexo constricto ; apertura co- 

 arctato-lunari,labro inferne bidentato, extremitatibus lamella 

 angulata ad collumellam adnata coadunatis. 



SYNONY3IS AND REFERENCES. 



Helix Texasiana, MORICAND, Mem. Genev. VI. 538, pi. 1, f. 2. 



DESHAYES, ed. Lamarck, VIII. 133. 



FERUSSAC, Hist, des Moll. pi. 69, D. f. 2. 

 Helix auriculata, BINNEY, Boston Journ. Nat. Hist. III. 3S7. 



DESCRIPTION. 



ANIMAL brownish, or dingy "white ; tentacles darker, 

 sheaths visible by a dark line, superior tentacles much 

 enlarged at tip. 



SHELL depressed, orbicular, rather solid, of a pale 

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

 faintly striated, and shining beneath. Spire nearly flat, 

 of five whorls separated by a well-marked suture, the 

 outer one obtusely angular at periphery, nearly at the 

 plane of the spire, and somewhat deflected near the 

 aperture. Beneath convexly 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- 



