50 PALKONTOLOCiY OF NEW JERSEY. 



behig- niarkod with iiari-ovv, (listaiit, iinpressod lines, wliile on tins one the 

 ribs are ))roniinent and ronnded, with sliarj) narrow snlci l)etween. The 

 featnre, mentioned 1)V I\Ir. (ionrad, of tlic ribs suddenly beeoniing- obsolete 

 toward the posterior margin, is only jjartially correct, as but few of the 

 specimens show it distinctly enough to be a pronounced featnre. 



Locdlifif: Mr. ( 'oiu'ad gives near MnlHca Hill, N. J., as the only locality, 

 and I have seen no specimens which I could identify with it from any other 

 place. Those used are all from the cabinet of the Academy of Natural 

 Sciences, Philadel])liia, and are presumed to be the originals of ( 'onrad's 

 description. 



Genus OARDITA Rruf.. 



C-ARDITA ffRANULATA. 



Plate IX, tigs. 1-4. 



Cardita (/ranulnfa Say; Jour. Acad. Nat. Sci. Phil., 1st ser., vol. 4, p. 142, PI. xii, 

 fig. 1 ; Conrad Miocene Foss., p. 12, PI. vii, fig. 1 ; Ileilprin, Proc. Acad. Nat. 

 Sci. Phil., 1SS7, p. 40;{. 



Carditu. [Actinoholnti) firnniilafa (Say) Oonrad; Proc. Acad. Nat. Sci. Phil., 1862, p. 

 578. 



Cardita tridentata Enunous?;- N. (Jar. Ueol. Surv., 1858, p. 302, Pig. 23r)a. 



Venericardla (Gardiocarditen) (/rarinlafa (Say); Meek, Check List Miocene Foss., p. 7 



"Sul)orbicular, with about twenty-tive convex I'ibs, and wrinkled 

 across; inner margin crenaie. 



"J5efflAs nearly central, a little prominent, curved backward; ribs gran- 

 ulated on the umbones, and transversely wrinkled near the base, convex; 

 apices somewhat prominent beyttnd the general curve of the shell; inner 

 margin and edge crenate; cardinal teeth two. 



"Length from the apex to the base four-tifths of an inch, breadth 

 nearly the same. 



"Rather pro})ortionally longer than the decussnte and more oblique." 

 (Say in .b>ur. Acad. Nat. Sci.) 



The specim(?iis obtained from New Jersey are all below the adult size, 

 the largest having a height of less than five-eighths of an inch. They are 

 all single valve and nearl>' all show evidences of much trituration on the 

 beach before indicdding, some to the extent of having the deep crennlations 



