LAMELLlBEA^sCHlATA OF THE LOWER MARLS. 127 



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

 lowing is Mr. 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 ver}^ 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 stronger than would be indic^.ted by Mr. Conrad's figure. I had 

 supposed this might possibly be an imprint of Vetocardia (Astarte) odoUrata 

 Gabb (Jour. A. N. &., 4, 394, C8, 27), but it differs 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 YETERICARDIA Conrad. 



(Proc. A. Nat. Sci., Phil., 1872, p. 52 = Vetocardia 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. I:^. J., 1868, p. 726. 



This species was originally described by Mr. Gabb from specimen^^ 

 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 such an individual, but he does not 



