EASTERN PROVIIsCE yOUTHERN REGION SPECIES. o(>5 



fleeted and turoed outwaids lioai the preceding- one, scrobiculate, con- 

 stricted, grooved within the niubilical region; suture impressed; aper- 

 ture oblique, ear-shaped, contracted ; peristome white, acute, continu- 

 ous, the margins joined by a tongue-shaped fold, excavated above, 

 entering into the aperture, the right margin having a deeply seated 

 lamella, which terminates in a reflexed hook, the base with an erect, 

 lamelliform, scarcely oblique tooth, produced into and recurved within 

 the aperture. Greater diameter 9^, lesser 8J""" ; height, 5"""'. 



Helix FosteUiana, Bland, Ann. N. Y. I.yc, vii, 35, fig. (1858).— W. G. Binnet, L. &Fr.. 



W. Sh.,i,89(1869). 

 UwdalocliUa Postelliana, Tryon, Am. Journ. Conch., iii, 156 (1867). 

 PoJygyra Postelliana, W. G. Binney, Terr. Moll., v, 26fi. 



Georgia, in Wayne County, and on the sea-islands of Georgia and 

 South Carolina; Baldwin, Fla. Not noticed out of the Southern Re- 

 gion, and j)robably a species of the Florida Subregion. 



It is smaller than auricuiata, and the rib-like striae which co\^er the 

 whole of that shell are scarcely developed at the base. The form of 

 the parietal process is very like that of uvulifera, but the continuation 

 of its inferior angle to the inner termination of the peristome is not 

 ])rostrate, as in that species, but erect, as in auriculata. The position 

 and form of the upper tooth on the peristome is much the same as in 

 that species and in uimlifera, but the lower one is entirely different. 

 In those it is an oblique, strongly developed, convex, sinuous fold on 

 the margin of the peristome, not descending into the aperture, there 

 being within a slight thickening only, corresponding with the lower 

 exterior apertural depression. In Postelliana there is at the base of 

 the peristome a thin, erect, oblong, lamelliform tooth, rather oblique, 

 but more closely marginal than the fold in the other species. The 

 exterior of this tooth is convex, within concave ; it is 1""" in height 

 and li in length, and descends rapidly into the aperture, where it is 

 recurved, and terminates obtusely opposite to the lower end of the 

 superior tooth, there being a very distinct and tortuous sinus between 

 the two. In opening specimens from different localities these charac- 

 ters are found to be constant. 



Jaw as usual in the genus, with over 12 ribs. 



Lingual membrane with 21-1-21 teeth. The marginals, as in auri- 

 formis {q. v.), have their inner cutting point simple, not bifid, even the 

 very last at the outer edge. "(Terr. Moll., V, Plate VI, Fig. N.) 



Genitalia as in P. auriculata. 



