164 PALEONTOLOGY OF NEW JERSEY. 



lines of growth. On them the posteror-cardinal marg-in 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- 

 lu-es show the V-shaped tooth beneatli 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 ver}^ narrow posterior tooth behind. From these charactei's it 

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

 nidce,a,s placed by some avithors; 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 clay at the base of 

 the Lower Marls at Haddonfield, Mr. Conrad's t^^pes of T. imrilis. It also 

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

 Jersey. It is also found in Delaware, and I cannot dislinguish 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 TELLIMEEA Conrad, 1871. 



(Am. Jour. CoucL., Vol. VI, p. 73.) 



TeUimera eborea. 



Plate XXIII, Figs. Vi aud 13. 



Tellina (TelUnimera) eborea Conrad. J. A. N. Sci., new ser., Vol. IV, p. 278, PI. XLVI, 



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

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



TeUimera eborea Conrad. Am. Jour. Conch., Vol. VI, p. 73. 



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

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



