Cincinnatian and Lexington Fossils 23 



ings belonging to the exterior. In these specimens, the concentric 

 striae on the exterior are fine, sharp, and rather distant, as in other 

 specimens from the same locahty, also identified as Lingula coving- 

 tonensis. 



Specimens pitted interiorly were described by Ulrich, from the 

 strata a few feet above low water mark, at Covington, Kentucky, 

 as Lingula zvhitficldi. In the latter, however, the shell is stated to 

 be relatively shorter, and broader in front, and the concentric 

 striae are described as rather irregular and never so regularly dis- 

 posed. 



The type of Lingula covingtoncnsis, numbered 139 in the 

 James collection at Chicago University, 12.6 mm. long and 10 mm. 

 wide, is characterized by strong and rather ecjuidistant concentric 

 striae, between which the remaining concentric striae are much less 

 conspicuous. It is preserved in a fine-grained limestone, the lower 

 half of which is full of a small form of Dalmanclla resembling 

 Dalmanella miiltisecta. It evidently was obtained from the lime- 

 stones several feet below the two-foot crinoidal layer which im- 

 mediately underlies the Fulton horizon. 



Lingula waynesboroensis, sp. nov. 



(Plate II, fig. iS; Plate V, fig. ;.) 



Three and a half miles northwest of Waynesboro, Tennessee, 

 near the home of W. D. Helton on Beech creek, a species of Lingula 

 occurs in the Saltillo limestone, closely resembling Lingula briseis, 

 Billings, and Lingula proctcri, Ulrich, in outline. The same species 

 occurs also in the Saltillo bed, at Clifton, Tennessee. 



The shell substance of this Tennessee species is white. The 

 shell is very thin. The lateral outline is gently convex or sub- 

 parallel anteriorly, converging gradually posteriorly toward the 

 beak. Anteriorly, the lateral outline rounds into the anterior 

 margin, and, the latter being less strongly convex, the outline of 

 the shell is more oblong than oval. Concentric striae, very fine, 

 and numerous, are separated by flat interspaces which usually are 

 several times as wide as the striae, at least along the middle part of 

 the shell, anteriorly. Radiating striae are usually absent, although 

 extremely fine radiating striae may be noted occasionally. The inte- 

 riors of pedicel valve occasionally have a low, broad septal elevation, 

 extending slightly beyond the center of the shell ; anteriorly, this 



