8o6 CRETACEOUS PALEONTOLOGY 



1861 



1864, 



1864 



1868 

 1868, 

 1892 



1892 



1892 



1892 



1905 



1905 

 1905 



Actczon ovoidea, Gabb, Proc. Acad. Nat. Sci. Phil. 



(1861), p. 319. 

 Actceon oindea Meek, Check List Inv. Foss. N. A., Cret, 



and Jour., p. 17. 

 Actceon cretacea Meek, Check List Inv. Foss. N. A., Cret. 



and Jur., p. 17. 

 Actceon cretacea Con., Cook's Geol. N. J., p. 728. 

 Actceon ovoidea Con., Cook's Geol. N. J., p. 728. 

 Actceon cretacea Whitf., Pal. N. J., vol. 2 (Monog. U. S. 



G. S., vol. 18), p. 158, pi. 19, figs. 9-12. 

 Actceon. ovoidea Whitf., Pal. N. J., vol. 2 (Monog. U. S. 



G. S., vol. 18), p. 162, pi. 20, figs. 5-6. 

 Actcson Forhesiana Whitf., Pal. N. J., vol. 2 (Monog. 



U. S. G. S., vol. 18), p. 157, pi. 19, figs. 17-22. 

 Actceon subovoides Whitf., Pal. N. J., vol. 2 (Monog. 



U. S. G. S., vol. 18), p. 155, pi. 19, figs. 14-16. 

 Actceon cretacea Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 18. 

 ActcEon forhesiana Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 19. 

 Actceon ovoidea Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 19. 



Description. — Shell variable in size, subovoid in general form, 

 with a moderately elevated spire; the dimensions of two indi- 

 viduals are: height, 39 mm. and 20 mm. ; maximum diameter, 25 

 mm. and 11.5 mm.; height of spire, 10 mm. and 7 mm.; height 

 of aperture, 29 mm. and 13 mm. Volutions four or five, with 

 distinctly marked sutures in the cast; body volution large, form- 

 ing the greater bulk of the shell, moderately convex in the middle 

 and slightly pointed below; aperture large, about two-thirds of 

 the total height of the shell, pointed at the upper end, and mod- 

 erately increasing in width anteriorly, its greatest width consid- 

 erably below the middle, obtusely pointed below. The columellar 

 cavity in the casts rather wide and furnished with a single mod- 

 erately strong tooth at about the broadest part of the aperture, 

 which is often but weakly developed; surface of the shell 



