T02 Bulletin ii 103 



deep; suture distin<ft; surface with revolving lines, indistindl 

 near the margin; aperture irregularly elliptical. 



" A deor bis depress us \^e:2i sp. {Teinostoma rotula Heilpr.) from 

 Claiborne has the umbilicus nearly closed, a regularly rounded 

 margin, a more developed ornamentation, and is larger." 



Having just examined the type of rohda kindly sent me from 

 the Am. Mus. Nat. Hist., I am inclined to think it an extremely 

 smooth variety of depressa, for its umbilical rib is the same and 

 on the base near the aperture there are traces of spiral punctuate 

 lines. 



Not having the type of subangidatus for comparison, it is with 

 great doubt that these Lignitic forms are referred to Meyer's 

 species. Instead of being smaller than depressus they are in some 

 instances of two or three times the dimensions of that species. 

 They vary greatly in angulation or carination of the body whorl. 

 They are generally rather finely striate or smooth above and more 

 strongly striate below. There is a thickening of the middle por-- 

 tion of the obliquely-cut columella, but no distindl umbilical rib 

 as seen in species like depressus The Lea Memorial specirrien 

 from Bell's (fig. 20) is flattened and smooth above; our Gregg's 

 landing specimen (fig's. 21, a) is more bicarinate, with higher 

 spire and striate above and below; the Sabinetown fragment 

 (fig's. 22, a, b) is more callous about its umbilicus and is smooth 

 and shining all over. 



Aldrich's ''Adeorbis depressus Lea" and ''Teinostoma subro- 

 tunda Mr.," from Bell's landing (Bull. 1, Geol. Surv. Ala., p. 

 87), come in near here somewhere. 



Fissurella alabama, n. sp. PI. 12, fig's. 23, a. 



Specific chara^erization.~^\z^ and general appearance as fig- 

 ured; low; marked exteriorly by about eighteen primary radii, 

 between which there are two or three secondary and sometimes 

 an equal number of tertiaries. Concentric striae strong, raised, 

 causing folds or granulations at their intersedlions with the 

 strong ribs. 



Locality. — Ala.: Gregg's landing. 



Type and specimen figured. — Lea Memorial Collection; Phila. 

 Acad. Nat. Sci. 



