172 PALEONTOLOGY OF NEW JEKSEY. 



The figure given by Mr. Conrad, cited above, is much too equilateral, and 

 does not represent the specimen in hand, which is the only one known, and 

 that from which his figure was made. 



Formation and locality, — In the micaceous clays below the Lower Marl, 

 at Haddonfield, New Jersey. From the collections of the Academy of Natu- 

 ral Sciences, Philadelphia. 



MACTRIDJE. 



Genus YELEDA Conrad, 1871. 



(Am. Jour. Conch., Yol. YI, p. 74.) 



Veleda lintea. 

 Plate XXIII, Figs. 18-21. 



Cardium {Protocardium) linteum Conrad. J. A. N. Sci., Phil., new ser., Yol. lY, p. 278, 



PI. XLYf, Fig. 17. 

 G. linteum (Con.) Gabb. Synopsis, p. 107. 



Veleda lintea Conrad. Am. Jour. Conch., Yol. YI, p. 74. Geol. Surv. N. Car. (Kerr's), 



p. 9, of Appendix, PI. I, Fig. 26. 

 Gymhophora lintea (Con.) Gabb. P. A. N^. Sci., 1876, p. 306. 



Shell small, subtriangular in outhne or somewhat transversely elongate- 

 triangular. Valves (left ones only seen) moderately ventricose, most prom- 

 inently so on the umbones and anterior to the middle; beaks proportionally 

 large, situated a little posterior to the middle of the length; anterior end of 

 the valves largest, rounded on the margin; basal line having a broad reo-u- 

 lar curve, and the posterior end obliquely sloping from the apex of the 

 valve, and a little more squarely truncate just above the basal angle. Um- 

 bonal ridge angular, but not carinate, rather decidedly marked, and the pos- 

 terior slope somewhat abrupt. Surface of the left valve marked by very 

 fine, but regularly increasing, even concentric ridges, which are separated 

 by very narrow deep lines. Along the posterior umbonal angle there is 

 one or possibly two faint radiating hues, one forming the crest, the other 

 posterior to it, but faint. 



The form and general appearance of these shells, in the only two im- 

 perfect examples which I have seen, is much like the smaller valve of a 

 Corbula, and would be commonly considered as such unless the hinge were 



