164 PALEONTOLOGY OF NEW JEESEY. 



lines of growth. On them the posteror-cardinal margin is seen to be 

 shghtly inflected, but the front is thin and sharp, showing not the least 

 tendency to form a lunule. The specimens, some of which are partial casts, 

 do not show the pallial sinus very distinctly, but faint indications of it can 

 be traced among the lines caused by fractures in the shell The hinge feat- 

 ures show the V-shaped tooth beneath the beak described, with an elon- 

 gate depression in front and an oblique elongate ridge behind it in the left 

 valve, and the right valve shows evidence of a bifid tooth beneath the 

 beak, with a very narrow posterior tooth behind. From these characters it 

 will be seen that the shell belongs to the JDosinince and not to the Unguli- 

 nidcEy as placed by some authors; but the general features of the shell are so 

 nearly those of Thetis Sowerby that there would hardly seem any neces- 

 sity of forming a new genus for it. As several authors have, however, 

 preferred to adopt Tenea, I have retained it under that designation. 



Formation and localities. — Found in the micaceous clav at the base of 

 the Lower Marls at Haddonfield, Mr. Conrad's types of T. parilis. It also 

 occurs at Holmdel, Upper Freehold, near Burhngton, and at Freehold, New 

 Jersey. It is also found in Delaware, and I cannot distinguish between 

 these casts and many of those of the same form which occur in the Eocene 

 layers of the Upper Green Sands at Farmingdale, Shark River, and near 

 New Egypt, New Jersey. 



TELLINID^. 



Genus TELLIMERA Conrad, 1871. 



(Am. Jour. Conch., Yol. YI, p. 73.) 



TeUimera eborea. 

 Plate XXIII, Figs. 12 and 13. 



Telli/na {Tellinimera) chorea Conrad. J. A. N. Sci., new ser., Yol. lY, p. 278, PI. XLYI, 



fig. 14. Meek, Check-list, p. 14* 

 T. eborea (Conrad) Gabb. Synopsis, p. 173. 



TelUmera eborea Conrad. Am. Jour. Conch., Yol. YI, p. 73. 



Shell small; the largest specimen used measuring only about eleven- 

 sixteenths of an inch in length. Form triangularly ovate or subtriangular 



