EASTERN PROVINCE INTERIOR REGION SPECIES. 227 



Zonites lasniodon, Phillips. 

 Shell very much flattened above, a little convex ; epidermis cor- 

 neous, shining; whorls 7, narrow, very slowly increasing in no. 244 

 diameter from the apes, to the ajjerture, and not expanding 

 at the aperture, with minute, transverse strife and wrinkles ; 

 suture moderately impressed ; peristome thin, acute ; aper- 

 ture nearly circular; within, upon the base, are 2 promi- '^^ don™" 

 uent, white, testaceous lamiu.ne, nearly parallel, and extending far 

 into the cavity of the wliorl ; umbilicus large, rather expanded, and 

 deep; base smootli, well rounded from the umbilicus to the circum- 

 ference. Greatest diameter, G""" ; lieight, 2i™™. 



Helix Jasmodon,* Phillips, Joiini. Acad. Nat. Sci., viii, 182 (1842) ; Proc. of same, 

 i, 28 (1841).— BixxKY, Terr. Moll., ii, 254, pi. xxxvii, fig. 2.— DeKay, N. Y. 

 Moll., 47 (1843).— Pfeiffer, Mon. Hel. Viv., iii, 142, v, 216 (1868).— W. G. 

 BiNXEY, Terr. Moll , iv, 122. 



Gaatrodo))ta lasmodon, Tryon, Am. Journ. Conch., ii, 257 (1866). 



Hi/alina lasmodon. W. G. Binxey, L. & Fr.-W. Sh., i. 



Zonites elasmodon, W. G. BlNNEY, Terr. Moll., v, 131. 



A species of the Cumberland Subregion, found thus far only in East- 

 ern Tennessee and in the mountains of Northern Alabama. 



Animal with the distinct locomotive disk, the longitudinal furrows 

 above the margin of the foot, and . the caudal mucus i)ore character- 

 izing Zonites. 



Jaw and lingual as usual in the genus. 



The lingual membrane (Terr. Moll., V, Plate III, Fig. O) has 41-1-41 

 teeth, with 9 perfect laterals. The reflected portion of the centrals 

 and laterals is short, as in Vitrina, 



Genitalia not observed. 



Zonites inacilentiis, Shuttl. 



Shell widely and perspectively umbilicate, depressed, arctispiral, 

 reddish horn-colored, diaphanous, above striated, scarcely F1G.249. 

 shining, smoother and shining and unicolored below; 

 whorls 8, very gradually increasing, subconvex, the last 

 furnished within the aperture with a white, subdentiform, 

 deeply entering callus ; aperture lunate-semicircular ; peri- 

 stome simple, acute. Greater diameter 8, lesser 7^""" ; 

 height, 3""". (Shuttle worth.) 



Z. macilentus. 

 Helix macilenta, Shuttl., Bern. Mitt., 1852, 195. — Gould, in Terr. Moll., iii, 20. — 



Pfeiffer, Mon., iii, 640. 

 Zonites lasmodon, part, W. G. Bixney, Terr. Moll., v. 

 Zonites macilentus, W. G. Binney, Ann. N. Y. Ac. Sc.,i, 359, pi. xv, fig. B. 



* Should not the name be rather Elasmodon? 



