LAMELLIBIIANCHIATA OF THE LOWER MARLS. 127 



near as it is practicable to do so, but it is highly unsatisfactory. The fol- 

 lowing is Ml-. Conrad's description : " Small, triangular, equilateral, com- 

 pressed ; basal margin regularly rounded ; angles of the end margins situ- 

 ated at about equal distances from the apex and base ; disk concentrically 

 undulated." I have seen only a single very imperfect impression of a small 

 shell from the dark-colored micaceous clays at Mr. Schank's pits near Marl- 

 borough, N. J., which bears any relations to Mr. Conrad's figure. Of this 

 1 have given a figure taken from a gutta-percha cast in the natural mold. 

 It is a very small species, not more than three-eighths of an inch in its 

 extreme height, and the surface bears six or seven very strong undulations, 

 much strong-er than would be indicated by Mr. Conrad's figure. I had 

 supposed this might possibly be an imprint of Vdocardia {Asfarfe) odoJirata 

 Gabb (Jour. A. N. S., 4, 394, C8, 27), but it diffei's somewhat in being more 

 triangular in form, that one being quadrangular and looking in the figure 

 given very like a young CrassateUa. 



Formation and locality. — Mr. Conrad's specimen was from Monmouth 

 County, New Jersey, which is not a very definite locality, while that above 

 referred to is from Marlborough, New Jersey, from Mr. Lockwood's col- 

 lection. 



Genus VETERICARDIA Conrad. 



(Proc. A. Nat. Sci., Phil., 1872, p. 52 = Vetoeardla Conrad. Am. J. Conch., VoL IV,. 

 p. 246, and Vol. V, p. 48.) 



Vetericardia octolirata. 



Astarte octolirata Gabb. J. A. N. Sci., new series, Vol. IV, p. 394, PI. LXVIII, f. 27. 



Synopsis, p. 100. Meek, Check-list, p. 11. 

 Vetocardia octolirata (Gabb) Meek. Geol. Surv. N. J., 1868, p. 726. 



This species was originally described by Mr. Gabb from specimens- 

 found at Eufaula, Ala., and subsequently catalogued as from New Jersey in 

 his synopsis. Mr Meek probably followed him in his identification of it 

 as a New Jersey species in his list in the Geological Report of 1868. I 

 have not seen specimens of it from within the State, nor do I know of it 

 occurring there from any reliable source. The figure given by Mr. Gabb- 

 (loc. cit.) would lead one to suppose it might be a young individual of a 

 species of CrassateUa, and there is no feature mentioned in his description 

 of it which might not equally apply to sucli an individual, but he does not 



