44 PALEONTOLOGY OF NEW JERSEY. 



ARCA (SCAPHARCA) LIENOSAf. 



Plate vi, figs. 10 and 10a, 



Area Uenosa Say: Am. Conchology, PI. 36; Tuomey and Holmes, Plioc. Foss. S. Oar., 

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

 ! Heilprin, Proc. Acad. Nat. Sci. Phil., 1887, pp. 400 and 402. 



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

 Check List Mioc. Foss., p. 6. 



"Shell rather thin, transversely oblong; ribs about 40, somewhat flat- 

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

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

 posterior margin, which are almost bifid; and with numerous slightly ele- 

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

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

 third of the length of the hinge margin; area narrow and elongated; hinge 

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

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

 backwards than the angle; anterior margin obliquely truncate; inner margin 

 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 Mr. L. Woolman, and are from the cabinet of the Academy of 

 Natural Sciences at Philadelphia. 



