MOLLUSCA. 601 



Super-family VENERACEA. 

 Family VENEBIDAE. 



Genus CYPRIMERIA Conrad. 



Cyprimeria densata (Conrad). 

 Plate LXVIIL, Fig. 14. Plate LXIX., Figs. 1-2. 



1853. Tellina densata Con., Jour. Acad. Nat. Sci. Phil., 2nd 



ser., vol. 2, p. 275, pi. 24, fig. 14. 

 1861. Dosinia densata Gabb., Synop. Moll. Cret. Form., p. 



176 (120). 

 1864. Dosinia densata Meek, Check List Inv. Foss. N. A., 



Cret. and Jur., p. 13. 

 1866. Cyprimeria densata Con., Am. Jour. Conch., vol. 2, p. 



102. 

 1886. Cyprimeria densata Whitf., Pal. N. J., vol. I (Monog. 



U. S. G. S., vol. 9), p. 157, pi. 22, figs. 202 1 (not 



fig. 19). 

 1886. Lucina smockana Whitf., Pal. N. J., vol. I (Monog. U. 



S. G. S., vol. 9), p. 130, pi. 1 8, figs. 21-22. 

 1886. Cyprimeria >'keilprini ' Whitf., Pal. N. J., vol. I (Monog. 



U. S. G. S., vol. 9), p. 1 60, pi. 22, figs. 14-15. 

 1905. Cyprimeria densata John., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 16. 

 (Not Dosinia densata Con., Jour. Acad. Nat. Sci. Phil., 2nd ser., 



vol. 3, p. 725, pi. 34, fig. i3,=Cyprimeria alta Con., 



Kerr's Geol. N. Car., App, p. 2^,=Cyprimeria ex- 



caivata Mort.) 



Description. Shell attaining a length of 81 mm., a height 

 of 66 mm., and a thickness of 25 mm. in the type specimen, the 

 proportion of height to length being as I : 1.23 in the internal 

 cast, were the actual shell preserved the height would be some- 

 what greater. Beaks situated about two-fifths of the length of the 

 shell from the anterior extremity. Anterior and basal margins 

 rounded, posterior margin broadly truncate at nearly right angles 

 to the longitudinal axis of the shell, posterior cardinal margin 

 nearly straight or slightly arcuate. 



