﻿394 DESCRIPTIONS OF NEW SPECIES OF 



margin strongly curved, anterior semicircular, basal and posterior regularly rounded, 

 surface marked by regular transverse ribs. 



Dimensions. — Length "55 in., width '7 in., diameter *38 in. 



Locality. — Ripley Group, Hardeman Co., Tenn. Prof. Safford. 



This species may be distinguished from Dione Delawarensis, Gabb, in its external 

 appearance, by being shorter proportionally, and more pointed posteriorly. The sur- 

 face markings are different, those of the latter species being finer and not so regular. 



V. Meekana. PI. 68, fig. 23. Subtriangular, beaks small, curved strongly anteri- 

 orly ; umbones small ; limule bordered by an impressed line; cardinal margin curved. 



Dimensions. — Length '35 in., width 5 in., height of valve - 1 in. 



Locality. — Ripley Group, Eufala, Alabama. Collection of the Smithsonian Institu- 

 tion, No. 551. 



CORBULA, Drug. 



C. subcompeessa. PL 68, fig. 24. Subquadrate, beaks nearly central ; umbones 

 large, umbonal ridge angular, umbonal slope abrupt, anterior margin regularly 

 rounded, posterior slightly sinuous, posterior subbiangular; hinge very small. 



Dimensions. — Length "14 in., width *22 in. 



Locality. — Two miles east of Middle ton, Hardeman Co., Tenn. 



This species resembles closely G. compressa, Lea, from the Eocene of Ala., although 

 it is undoubtedly distinct. 



C. ceassiplica. PI. 68, fig. 25. Subtriangular, heavily ribbed, thick ; beaks large 

 and incurved ; umbones large and round ; umbonal ridge small and marked by a dis- 

 tinct groove immediately in advance of it, rest of the shell marked by about a dozen 

 very coarse transverse ribs except on the umbones which are smooth apparently from 

 attrition. Inside hinge large, caudal prolongation marked by two pit-like depressions,, 

 Dimensions. — Length 45 in., width -2 in., height of right valve -07 in. 

 Locality. — From a cut on the Memphis and Charleston R. R., where it crosses the 

 Tennessee and Mississippi State line, with Astarte crenulirata, Con. Prof. Safford. 



C. Eufalensis, PI. 68, fig. 26. Subtriangular; angles, except posterior, rounded; 

 beaks small, pointed anteriorly ; left valve very convex ; margin strongly incurved, 

 almost at a right angle ; anterior margin above straight, below abruptly rounded ; 

 basal margin very slightly sinuate; posterior margin angular at its junction with the 

 basal, incurved above ; hinge large ; right valve ? 



Dimensions. — Length -4 in., width about '1 in., height of left valve -2 in. 

 Locality. — Ripley Group, Eufala, Ala. Collection of Smithsonian Institution, No. 

 560. 



ASTARTE, Soto. 



• 



A. octolieata. PL 68, fig. 27. Subquadrate, flattened ; beaks small and very 



