ZONITES. 289 



Moll, ir, 229, pi. xxxli.— Pfeiffer, Mon. Hd. Viv, I, 112.— W. G. 

 BiNNEY, Terr. Moll. IV, 110. 

 Hyalina subplana, Tryon, Am. Jouru. Conch. II, 250, pi. iv, f. 23 (1866). 



Eastern Tennessee and Pennsylvania, in mountainous regions. 



The only American species which this shell can be said to 

 resemble is Z. inornala, which in size and color is quite like it, 

 and at first sight may be taken for it. It differs from it in the 

 following particulars : The upper and lower surfaces are both 

 more flattened, and the outline is a more perfect circle. The 

 number of Vhirls, in specimens of the same size, is greater by 

 nearly one volution. The surface of the whirls is less rounded ; 

 the last whirl expands but very little towards the aperture ; the 

 base is broader, less indented, and very flat ; the umbilicus is 

 rounder, and better defined ; and the aperture is not thickened 

 within, by a white, testaceous deposit. 



Zonites inornata, Sat. — Shell depressed ; epiderTiiis yellowish 

 Lorn-color, smooth, shining, with very minute lines not breaking the 

 smoothness of the surface ; whirls five ; suture not mu<h impressed ; aper- 

 ture transverse, scarcely oblique, obliquely-lunar, with a 

 thick, white, testaceous deposit around its whole inner ^^?>- ^'■°' 

 surface, a little distant from the margin ; peristome thin, 

 acute, fragile, its ends somewhat converging, the columel- 

 }f\v margin reaching to the centre of the base, subdilated 

 "hove; umbilicus small; base ratlier flattened, indented 

 -'' I the centre. Greater diam. 16, lesser 12i ; height 6 mill. 



Helix inurnaia, Say, .Journ. Acad. Nat. Sci. Pliilad. II, 

 371 (1821) ; Binney's ed. 24.— Binney, Bost. Journ. 

 Nat. Hist. Ill, 419, pi. xxi, f. 3 (1840) ; Terr. Moll. 

 II, 227, pi. xxxiv.— DeKay, N. Y. Moll. 39 (1843).— 

 Adams, Vermont Mollusca, 161 (1842). — Pfeiffer, 

 Mon. Hel. Viv. I, 84; IV, 4S.— W. G. Bixney, Terr. Moll. IV, 109.— 

 MoKSE, Amer. Nat. I, 314, f. 19, 21, 22 (1867). 



Helix glaphyra, Pfeiffer, olim, SyraboliB, II, 29, excl. syn. fuliginosa ; 

 Mon. Hel. Viv. I, 57. — Reeve, Con: Icon. 667. — Not Say. 



Helix inornata, Bikney, not Say, Bland, Ann. N. Y. Lye. VII, 127. 



Hyalina inornata, Tryon, Am. Journ. Conch. II, 249, pi. iv, f. 22 (1866). 



From ]S"orth Carolina to Kentucky through the States border- 

 *ng on the great lakes. In the western parts of New Engluud 

 it is found, but very rarely. 



Animal with head, neck, and eye-peduncles bluish-black ; foot 

 whitish. Eye-peduncles long and slender. A marginal furrow 

 19 February 1869. 



