HELIX. 189 



smaller than any specimen of H. avara that I have seen, 

 and have other specimens of H. avara, so called, as large 

 as the most mature H. auriculata. Plate XL. figure 1, 

 represents the mature shell ; figure 2, the young shell, 

 described by Say as P. avara. 



HBHHSffi^^ 



MOT 





41. HELIX VUL.TUOSA, GOULD. 



PLATE XL. a. FIGURE 4. 



H. testa orbicular!, utrinque convexiuscula, rufo-cornea, 

 late umbilicata, confertim striata : spira depressa, anfract- 

 ibus 5^- convexis, ultimo ad peripheriam subangulato : 

 apertura lunari ; labro albo, crasso, tortuoso, dente basali, 

 marginal!, falcato, et dente mediano, obliquo, profundo, 

 armato ; lamella columellari obliqua, arcuata, erecta, nisi 

 infra ad labrum juncta. 



SYNONYMS AND EEFEKENCES. 



Helix vuhuosa, GOULD, Proc. Bost. Soc. Nat. Hist. III. 39, anno 1S48. 

 DESCRIPTION. 



SHELL orbicular, depressed, about equally convex on 

 both sides, rather solid, dark horn-color, delicately stri- 

 ated ; spire a low dome, composed of about five and a 

 half whorls, which are moderately convex, and separated 



