MOLLUSCA. 623 



Genus AENONA Conrad. 



Aenona eufaulensis Conrad. 

 Plate LXX., Figs. 24-25. 



1860. Tellina Eufaulensis Con., Jour. Acad. Nat. Sci. Phil. 2d 



ser., vol. 4, p. 277, pi. 46, fig. 15. 



1 86 1. Tellina Eufalensis Gabb, Synop. Moll. Cret. Form., p. 



229 (173). 

 1864. Tellina eufalensis Meek, Check List Inv. Foss. N. A., 



Cret. and Jur., p. 14. 



1870. ^Enona eufaulensis Con., Am. Jour. Conch., vol. 6, p. 74. 

 1886. JEnona Eufaulensis Whitf., Pal. N. J., vol. i (Monog. 



U. S. G. S., vol. 9), p. 168, pi. 23, figs. 2-3. 

 1905. JEnona eufaulensis Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 1 6. 



Description. "Shell small, triangularly ovate in outline, three- 

 fourths as high as long, with the small beaks situated a little more 

 than one-third of the length from the anterior end. Cardinal 

 margins rapidly sloping from the beaks, the anterior most rapidly, 

 and the anterior end sharply rounding just above the basal line; 

 posterior end more broadly rounded, but still narrowed; basal 

 line broadly curved. Surface of the valve smooth and semipol- 

 ished, the disk rather highly convex for a Tellina-\ike shell, with 

 very small pointed beaks, a slight angularity of the umbonal 

 region just in front of it, and a very narrow but distinctly cir- 

 cumscribed lunule. In the interior the hinge-plate is very narrow, 

 with a single small cardinal tooth in the right valve and very 

 small and narrow lateral teeth. Muscular markings unknown." 

 (Whitfield). 



Remarks. This species is authentically recognized in the Cre- 

 taceous faunas of New Jersey only from Haddonfield. There 

 are some internal casts from the Wenonah sand near Marlboro 

 (locality 130), which more or less resemble Whitfield's illustra- 

 tion of this species, but they are probably all of them Tellinimera 

 eborea, whose outline is similar to this species, but is proportion- 

 ally higher. 



