546 CRETACEOUS PALEONTOLOGY. 



margin, which is sometimes slightly sinuate posteriorly and again 

 nearly straight or slightly convex. The species resembles B. caro- 

 linensis, but it is a shorter shell with a higher posterior margin; 

 the two forms are certainly cogeneric, however, and if it is ad- 

 visable to recognize Etea at all as distinct from Veniella, both 

 should be placed in that genus. 



Formation and locality. — Merchantville clay-marl, near Mata- 

 wan (loi), near Jamesburg (140, 141), Lenola (163), Mer- 

 chantville (162). 



Geographic distribution. — ^New Jersey, Alabama, Texas. 



Etea delawarensis (Gabb). 

 Plate LIX., Figs. 8-9. 



i860. Crassatella Delawarensis Gabb, Jour. Acad. Nat. Sci. 



Phil., 2d ser., vol. 4, p. 303, pi. 48, fig. 20. 

 1 86 1. Crassatella Delawarensis Gabb, Synop. Moll. Cret. Form., 



p. 168 (112). 

 1864. Crassatella delaivarensis Meek, Check List Inv. Foss. N. 



A., Cret. and Jur., p. 11. 

 1868. Crussatella delawarensis Cook, Geol. N. J., p. 376, figure. 

 1868. Crassatella Delawarensis Con., Cook's Geol. N. J., p. 726. 

 1876. Btea Delawarensis Con., Proc. Acad. Nat. Sci. Phil. 



(1876), p. 275. 

 1886. Crassatella Delawarensis Whitf., Pal. N. J., vol. i 



(Monog. U. S. G. S., vol .9), p. 210, pi. 27, figs. 14-15. 

 1905. Crassatellites delawarensis Johns., Proc. Acad. Nat. Sci. 



Phil. (1905), p. 14. 



Description. — The dimensions of a nearly perfect specimen are : 

 length, 26 mm.; height, 19.5 mm.; thickness, 12.5 mm. Shell 

 cuneately subovate or subtriangular in outline, highest in front, 

 the beaks elevated, rather small, incurved, situated between one- 

 third and one-fourth the length of the shell from the anterior 

 extremity. Antero-cardinal margin rather long, nearly straight 

 or slightly concave, sloping steeply forward from the beaks; 

 anterior margin rather narrowly rounding into the basal margin; 



