family helicid^e helix. 37 



Helix fuliginosa. 



PLATE III. FIG. 22. 

 H. fuliginosa, Griffith. Adams, Am. Jour. Sc. Vol. 40, p. 273. 



Description. Shell large, pellucid, polished, little elevated. Volutions slightly convex. 

 Lip simple. Umbilicus open, broad, profound ; its margin furrowed by the tranverse 

 wrinkles, which become effaced towards the periphery of the body-whorl. Aperture large, 

 simple, semilunate. 



Color. Light waxen, polished, with greenish tinge ; interior of the mouth rosaceous. 



Diameter, 1*0. 



This species has been detected near Troy in this State, by Dr. Newcomb. It is allied to 

 «.he following species, from which, however, I suppose it to differ constantly in size. 



Helix cellaria. 



PLATE HI. PIG. 25 a. b.— (STATE COLLECTION.) 



Helix cellaria. Mullee, Verm. Hist. No. 130. 



H. glaphyra. Say, Nich. Ency*Ed. Am. Vol. 4, pi. 1, fig. 3. 



H. nitida. Uraparnaud, Moll. pi. 8, fig. 23 to 25. 



H. cellaria. Binney, Bost. Jour. Nat. Hist. Vol. 3, pi. 26, fig. 2. 



H. id. Gould, Invertebrata of Mass. p. 180, fig. 104. 



Description. Shell moderately small, orbicular, depressed, concave beneath, thin, fragile, 

 smoothly polished. Whorls five, slightly convex, with irregular obsolete transverse wrinkles. 

 The umbilicus moderate, gradually enlarging towards the circumference of the body-whorl. 

 Lip simple, thin, acute and regular. Aperture lunate, broader than high. 



Color. Waxen or whitish, polished, slightly tinged with greenish, with deeper colored ver- 

 tical striae ; within the aperture, purplish. Animal light indigo-blue above, darkest on the 

 head ; collar greenish. 



Diameter of the shell, 0'3 - 0'5. 



This animal is now supposed, by the most recent American conchological writers, to be 

 identical with the cellaria of Miiller, and to have been introduced about water-casks, green- 

 house plants, etc. It is often confounded with inornata of Say, in the immature state of the 

 latter species, when the umbilicus is but small. 



