676 CRETACEOUS PALEONTOLOGY. 



specimens, but on one specimen they seem tO' consist of closely- 

 arranged spiral lines. The generic relations of the species have 

 not been satisfactorily determined. 



Pormation and locality.' — ? Cliffwood clay, Cliffwood Point 

 (Whitfield). 



Geographic distribution. — New -Jersey. 



Genus Cavoscala Whitfield. 



Cavoscala annulata (Morton). 



Plate LXXVr., Figs. s-7. 



1834. Scalaria annulata Mort., Synop. Org. Rem. Cret. Gr. U. 



S., p. 47, pl- 3, % 10. 

 1 86 1. Scala annulata Gabb, Synop. Moll. Cret. Eorm., p. 135 



(79)- 

 1864. Scala annulata Meek, Check List Inv. Foss. N. A., Cret. 



and Jur., p. 20. 

 1868. Scala annulata Con., Cook's Geol. N. J., p. 729. 

 1876. Scala {Opalia) annulata Gabb, Proc. Acad. Nat. Sci. 



Phil. (1876), p. 298. 

 1892. Cavoscala annulata Whitf., Pal. N. J., vol. 2 (Monog. 



U. S. G. S., vol. 18), p. 177, pi. 22, figs. 1-5. 

 1905. Scala annulata Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 20. 



Description. — "Shell above a medium size for shells of this 

 group, the lai'gest individual, if perfect at the apex, would meas- 

 ■ tire fully i ^ inches in length, with the aperture probably yet im- 

 perfect. Volutions about seven in number in the largest speci- 

 men, very ventricose and very slightly angular in the middle, 

 closely coiled or in close contact; sutures deeply marked and 

 characterized by a slightly beaded band at the bottom, formed 

 by the edge of a broad, flattened, raised, or thickened space, which 

 marks the base of the volutions and borders the umbilicus. 

 Umbilicus very large, angular on the margin and rapidly slop- 

 ing within, showing the preceding volutions in the cavity. Aper- 



