EASTERN PROVINCE IMTEKIOK EEGION SPECIES. 



317 



Fig. 340. 



jwincanus. 



Mcsodoii Dowiiicaiius, Bland. 



Shell umbilicate, imibilicus nearly covered, snbgiobose, thin, Subpel- 

 lucid, with obsolete, rib-like striai decussated with crowded, 

 microscopic spiral lines-, greenish horn-colored; s])ire short, 

 obtuse; whorls 5, convex, the last tumid, anteriorly some- 

 what gibbous, scarcely descending, constricted; aperture, 

 oblique, lunate-oval; peristome white, labiate, reflected, 

 right margin exi)anded, columellar margin angularly di- m. doi 

 lated, nearly covering the umbilicus. Greater diameter 10.^, lesser 9^'""'; 

 height, G'"'". 



HeUx Doivnkava, Bland, Ann. N. Y. Lye, vii, 420, pi. iv, figs. 23, 24 (1861).— W. G. 



BiNNEY, L. & Fr.-W. Sh., i, 151 (IfiO'J). 

 MesodoH Dotvnkana, Tryox, Am. Journ. Conch., iii, 47 (1867). — W. G. BixnfA", Terr. 



Moll., V, 33.'>. 



Monroe County; University Place, Franklin County, Tennessee; 

 Whitley County, Kentucky. A species of the Cumberland Subregion, 



Animal with the usual characters of the genus. 



Jaw as usual; over 10 ribs. 



The lingual membrane (Terr. Moll., V, Plate VIII, Fig. F) has 35-1- 

 35 teeth, with 12 laterals. The side cusps and cutting points are visi- 

 ble on the second lateral tooth. 



Mesodoii L.ii\%'i, Lewis. 

 Shell narrowly umbilicated, globose, surface hardly broken by deli- 

 cate incremental striae, horn-colored; sjiire elevated, apex 

 obtuse; whorls 4, convex, suture impressed, the last globose, 

 descending, deeply constricted behind the j)eristome; aper- 

 ture oblique, lunate, narrow, with a liuguiform tooth on the 

 parietal wall; peristome white, thickened, reflected, its ter- 

 minations approached slightly, that of the columellar some- 

 what concealing the very narrow umbilicus. Greater diam- 

 eter 6, lesser 5"^™; height, 3™". 



Helix Laid, Lewis, Proc. Acad. Kat. Sci. Pliila., 1874, 118 (fig). 

 Mesodon Lawi, \V. G. Bixney, Terr. Moll., v, 335. 



Probably a species of the Cumberland Subregion. Hayesville, Clay 

 County, North Carolina, in a field, at the loots of strawberry plants, 

 by Miss Annie M. Law. Houston, Hall and Habersham Counties, 

 Georgia; Hemphill. White Cliff", INIonroe County, Tennessee. 



A toothless form of this species was found by Mr. Hemphill at Tal- 

 lulah Falls, Ga. 



Animal unobserved. 



If. Lawi. 



