COLIMACEA. MOLLUSC A. HELIX. 181 



M6th., Vers, ii. 215. Lam. ; Jin. sans Vert., viii. 71. Binney ; BosL. Journ. 



Xat. Hist., iii. pi. 26, f. 2. 

 Helix nitida, Draparnaud ; Moll., pi. 8, f. 23 to 25. 

 Helix nitens, Maton and Rackett ; Liri. Trails., viii. 198, pi. 5, f. 7. Brard ; 



Hist, des Moll., 34, pi. 2, f. 2. 

 Helix glaphyra. Say ; JVicholso7is Encyc, {Amcr. cd.), iv. pi. 1, f. 3. 

 Zonites cellarius, Gray's Turton, 4"C., 170, pi. 4, f. 40. 

 Zonites lucida, Leach; Mss. 



Shell small, orbicular, depressed, concave beneath, thin, pellu- 

 cid, smooth, and glistening ; whorls five, slightly convex, with 

 minute, almost imperceptible lines of growth, otherwise highly 

 polished ; color light-greenish, horn-colored above, drab-colored 

 beneath, or milky-white. x\perture rounded, but broader than 

 high ; lip simple, very thin and sharp ; base elegantly rounding 

 into a rather large and deep umbilicus. Diameter rather less than 

 half an inch. 



Animal has its upper surface light indigo-blue, darkest on the 

 head, neck, and tentacula, collar greenish, eyes black. Foot 

 narrow and slender, not much exceeding in length the diameter of 

 the shell, and terminating acutely. 



Found in gardens, damp cellars, about cisterns, and similar 

 moist and fertile localities. 



There can be no doubt that the H. glaphyra of Say is identical 

 with the H. cellaria of Muller ; a comparison of shells of the same 

 size and growth showing them to be absolutely similar in every re- 

 spect. It was probably imported from Europe, as it may have easily 

 been, about water casks, green-house plants, &c. 



It seems as yet to be confined to the Northeastern and Middle 

 States. The shell which is very commonly found marked as H. gld- 

 phi/7'a is the H. inprndta, Say, in an immature state. This is a less 

 delicate shell, but in its earlier stages, when there is but a small um- 

 bilicus, there is no inconsiderable resemblance between the two, and 

 it would accord well with the description ; but no one familiar with 

 the present species would ever mistake one for the other. 



Helix indenta'ta. 



Shell orbicular, depressed, very thin and shining ; whorls four, 

 the external one marked with rather distant impressed lines radi- 

 ating from the closed umbilicus ; lip simple. 



