44 TALEONTOLOGY OF NEW JERSEY. 



ARCA (ScAPHAKCA) LlENOSAl 



Plate VI, figs. 10 and 10a. 



Area iienosa Way: Am. Coucbology, PI. 36; Tuomey and Holmes, Plioc. Foss. S. Car., 

 p. 41, PL XV, Figs. 2 and 3; Emmons's Geol. N. Car., 1852, p. 284, Fig. 204; 

 ? Heilprin, Proc. Aead. Nat. Sci. Phil., 1887, pp. 400 and 402. 



iScapbarca lunosa (Say) Conrad: Proc. Acad. Nat. Sci. Phil., 1862, p. 579; Meek 

 Check List Mioc. Foss., p. 6. 



"(S'/^f// rather thill, transversely oblong-; ribs about 40, somewhat flat- 

 tened and much broader than tlie intervening spaces which are very nar- 

 row, and with a longitudinal impressed line, particularly on those of the 

 posterior margin, which are almost biiid; and witli numerous slightly ele- 

 vated transverse lines, which being divided by the longitudinal strise appear 

 granulated; beak but little prominent, and nearly opposite to the posterior 

 third of the length of the hinge margin; are,a narrow and elongated; hitu/e 

 margin rectilinear, angulated at each extremity; teeth numerous, small; 

 posterior niarejin obliquely rounded inwards, no part of it extending further 

 backwards than the angle; anterior inanjin obliquely truncate; inner man/in 

 crenate." (Say in Am. Conch.) 



This species also comes represented by several fragments, which are 

 somewhat questionable in character, and may possibly not have belonged 

 to the species above cited. The fragments are all quite small, and although 

 they represent different parts of the margin of the shell, they are too indefi- 

 nite to be relied upon as conclusive. 



The specimens are from the well boring at Atlantic City, N. J., col- 

 lected by ]\Ir. L. Woolman, mid are from the cabinet of the Academy of 

 Natural Sciences at Philadelphia. 



