LAMELLIBEANCHIATA OF THE LOWEE MAELS. 43 



Auomia tellinoides. 

 Plate IV, Figs. IQ, 13. 



Anomia tellinoides Morton. SyDop., j). 61, PI. Y, Fig. 11. Gabb, Synop. Cret. Form., 

 p. 95. Meek, Check-list Smith. Inst., p. 7. Geol. Eept. K Jers., 1868, p. 427. 



A, tellinoides and A, argentaria (Mort.). Conrad, Geol. N. G, Kerr's Eept., Appendix, 

 p. 13. 



Shell measuring from one inch to one and a half inches in diameter, 

 more or less circular in outline, and irregularly biconvex or concavo- 

 convex in profile. Larger valve generally convex and often inequilat- 

 eral, with the apex nearly or quite marginal, though sometimes distant from 

 the edge of the valve and more convex than the later portions of the shell. 

 Flat valve with a moderately large opening situated at some distance from 

 the edge of the shell. Shell lamellose or smooth, and one cast shows 

 evidence of plications toward the outer margin. 



Formation and locality, — I have 'seen a single cast, of both valves in 

 position, from the green marls of the Lower Green Sand at Holmdel, and 

 impressions of several convex valves from the white limestone beds at tlie 

 same locality, but have never seen any of the shells preserved except from 

 near Freehold. Dr Morton does not state from what part of New Jersey 

 his specimen came, althougli he says it is common in the marls of the 

 State. Mr. Conrad cites A. argentaria as a synonym, though on a single 

 specimen which I have identified as of that species there are certainly good 

 specific features. 



Genus DIPLOSCHIZA Conrad. 1866. 



(Am. Jour. Conch.. Yol. II, pi). 77 and 105.) 

 Diploschiza cretacea. 



Plate IV, Figs. 4-8. 



Diploschiza cretacea Conrad. Am. Jour. Conch., YoL II, pp. 78 and 105, PI. IX, Fig. 203. 



Deeper valve anomia-like, deeply concave internally, and most abrupt 

 gn the posterior side. Margin entire, and the apex truncate from attach- 

 ment to foreign substances (f). Smaller valve concave externally, with a 

 notch in the cardinal margin. Surface of the shell marked by very fine 

 concentric lines of growth and a few stronger undulations. 



