128 PALEONTOLOGY OF :NEW JEESEY. 



mention anything of the interior. The figure given by Mr. Gabb is so 

 poor that, being of a specimen occurring outside of the State limits, I have 

 not deemed it worth while copying, and think it highly improbable that it 

 will be satisfactorily recognized as a New Jersey species. 



Vetericardia creniilirata. 

 Plate XVIII, Figs. 5-7. 



Astarte crenulirata Lea. Proc. A. N. Sci., 1861, p. 150. Conrad, J. A. X. Sci., new 

 series. Vol. IV, p. 282, PI. XLVI, Fig. 25. Gabb, Syuops., p. 100. Meek, 

 Checklist, j), 11. 



Gouldia f crenulirata (Con.) Meek. Geol. Surv. X. J., 1868, i). 726. 



Astarte corbicula Conrad. Am. J. Conch., Vol. Ill, p. 12. 



Vetocardia crenulirata Con. Am. Jour. Conch., Yol. Y, j). 43, PI. I, Fig. 23, p. 18. 



Vetericardia crenulirata Conrad. Proc. A. N. S., Phil., 1872, p. 52, PI. I, Fig. 4. 



Shell small, not exceeding one-fourth of an inch in length in adult in- 

 dividuals, subtriangular or broadly subelliptical in outline, with very ven- 

 tricose valves and proportionally large, suberect beaks, which are situated a 

 little in advance of the middle. Surface marked by from thirteen to eight- 

 een concentric varices, according to the size of the shell, which gradually 

 increase in strength with increased growth of the shell. These become obso- 

 lete at the margin of the proportionally large and deeply impressed lunule. 

 Interspaces flattened at the bottom, and about as wide as the sharply ele- 

 vated varices. There are also fine, but distinct elevated radiating lines cross- 

 ing the ridges and interspaces, becoming much stronger on the spaces than 

 on the ridges. In the interior the muscular imprints are faintly marked and 

 of moderate size, and the margin of the valves is strongly and deeply cren- 

 ulated by the radiating ridges. Hinge-plate moderately strong and the 

 teeth well marked. 



This is a very pretty and well-marked species. The hinge structure 

 would seem to warrant its removal from the genus Astarte^ but it does not 

 correspond with Gouldia any better, as was thought by Mr. Meek, and Mr 

 Conrad subsequently proposed the genus Vetocardia for its reception, which 

 he afterwards changed to Vetericardia, Mr. Lea seems to have first described 

 it, as is indicated by Mr. Conrad's reference in the American Journal of 



