108 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Helix suhplana, Binney, Bost. Journ. Nut. Hist., IV. Part I. cover, p. 3 (1842) ; 



IV. 241 (1842); Tem Moll., II. 229, PI. XXXIII. — Pfeiffeu, Mon. HeL 



Viv., I. 112. —W. G. Binney, Terr. Moll., IV. 110. 

 Hyalina s^ibplana, Tryon, Am, Journ. Conch., II. 250 (1866). 

 Zonites mbplanus, W. G. Binney, L. & Fr.-W. Sh., I. 288 (1869). 



A species of the Cumberland Subregion, having been found in Eastern ■ 



Tennessee and Lawrence County, Kentucky. It has also been found in West- 

 ern Pennsylvania in the mountains. i 



The only American species which this shell can be said to resemble is Z. ' 



itiornatus, 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 whorls, in specimens of the same size, is greater by nearly one volu- 

 tion. The surface of the whorls is less rounded ; the last whorl 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. 



It is an extremely rare species. 



Animal unknown. 



Zonites inornatus, Say. 

 Vol. ni. PI. XXXIV. 



Shell depressed ; epidermis yellowish horn-color, smooth, shining, with very 

 minute lines not breaking the smoothness of the surface ; whorls 5 ; suture 

 not much impressed ; aperture transverse, scarcely oblique, obli(|uely 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 con- 

 verging, the columellar margin reaching to the centre of the base, subdilated 

 above ; umbilicus small ; base rather flattened, indented in the centre. Greater 

 diameter 16, lesser 12^ mill.; height, 6 mill. 



Helix inornata, Say, Journ. Acad. Nat. Sci. Philad., II. 371 (1821); Binney's 

 ed. 24. — Binney, Bost. Journ. Nat. Hist., III. 419, PI. XXI. Fig. 3 (1840); 

 Terr. Moll., II. 227, PL XXXIV.— DeKay, N. Y. Moll., 39 (1843).— Adams, 

 Vermont Mollusca, 161 (1842). — Pfeiffer, Mon. Hel. Viv., I. 84 ; IV. 48.— • 



W. G. Binney, Terr. Moll., IV. 109. —Morse, Amer. Nat., I. 314, Figs. 19, 

 21, 22 (1867). 



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

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



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



Hyalina inoimata, Tryon, Am. Journ. Conch., II. 249 (1866). 



Zmites inornata, W. G. Binney, L. & Fr.-AV. Sh., I. 289 (1869). —Gould and 

 Binney, Inv. of Mass., ed. 2, 453 (1870). 



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

 Eye-peduncles long and slender. A marginal furrow extending along the 



