MOLLUSCA. 535 



1834. Venilia* conradi Mort, Synop. Org. Rem. Cret. Gr. U. 



S., p. 67, pi. 8, figs. 1-2. 

 1861. Venilia conradi Gabb, Synop. Moll. Cret. Form., p. 233 



(177). 



1864. Venilia conradi Meek, Check List Inv. Foss. N. A., Cret. 

 and Jur., p. 13. 



1868. Venilia conradi Con., Cook's Geol. N. J., p. 727. 



1869. Goniosoma infiata Con., Am. Jour. Conch., vol. 5, p. 44, 



pi. i, fig. 10. 



1870. Venilia elevata Con., Am. Jour. Conch., vol. 6, p. 74, pi. 



3, figs. 7-73. 

 1876. Veniella conradi Meek, Rep. Inv. Cret. and Tert. Foss. 



Up. Mo., p. 148, text figs. 9-11. 

 1886. Veniella conradi Whitf., Pal. N. J., vol. i (Monog. U. 



S. G. S., vol. 9), p. 144, pi. 19, figs. 8-10. 

 1886. Vmiella innata Whitf., Pal. N. J., vol. i (Monog. U. S. 



G. S., vol. 9), p. 147, pi. 19, figs. 4-5. 

 1886. Veniella elevata Whitf., Pal. N. J., vol. i (Monog. U. S. 



G. S., vol. 9), p. 148, pi. 19, figs. 6-7. 

 1905. Veniella conradi Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 13. 

 1905. Veniella elevata Johns,, Proc. Acad. Nat. Sci. Phil. 



(1905), p. 13. 

 1905. Veniella inflata Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 13. 



Description. The dimensions of an average sized left valve 

 are: length, 26 mm.; height, 23 mm.; convexity, 12 mm. Shell 

 subtrapezoidal in outline. Hinge-line rather strongly curved. 

 Anterior margin straight above, sloping obliquely forward, 

 sharply rounding into the basal margin below; basal margin 

 gently convex, becoming straighter posteriorly; postero-basal 

 extremity angular ; posterior margin obliquely truncate ; postero- 

 cardinal extremity obtusely angular, becoming rounder in the 

 larger individuals; postero-cardinal margin rather long, straight 

 or slightly convex. Valves very ventricose, with a sharply 

 angular, curved umbonal ridge. Beaks situated nearly as far 



