MOLLUSCA. 8ii 



Genus Cinulia Gray. 



Cinulia naticoides (Gabb). 



Plate XCIX., Figs. 12-13. 



i860. ActcBonia naticoides Gabb, Jour. Acad. Nat. Sci. Phil., 



2d ser., vol. 4, p. 299, pi. 48, fig. 2. 

 1861. Actaeonina naticoides Gabb, Synop. Moll. Cret. Form., 



P- 94 (38). 

 1864. Cinulia ( ?) naticoides Meek, Check List Inv. Foss. N. 



A., Cret. and Jur., p. 16. 

 1868. Cinulia ( ?) naiicoides Con., Cook's Geol. N. J., p. 728. 

 1868, ActcBonina. naticoides Con., Cook's Geol. N. J., p. 728. 

 1892. Cinulia {Oligoptycha) naticoides Whitf., Pal. N. J., vol. 



2, (Monog. U. S: G. S., vol. 18), p. 161, pi. 19, figs. 



28-30. 

 1905. Cinulia naticoides Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 19. 



Description. — Shell small, subglobular in form, the dimen- 

 sions of a nearly perfect internal cast being : height, 9 mm. ; 

 diameter, 8.8 mm. Volutions about three in number, spire very 

 low, nearly conforming with the rotundity of the body volution. 

 Aperture narrowly ovate, about two-thirds as high as the body 

 volution, widest below, pointed above. Outer lip thickened and 

 crenulate within. Columella short, the columellar lip marked by 

 a single rather strong revolving fold, shown as a groove in the 

 casts, situated low down. Surface of the shell marked by fine 

 revolving lines very faintly shown on the casts. These lines 

 are slightly raised and rounded on the casts, from 20 to 30' being 

 present on the body volution. 



Remarks. — This little species resembles Avellana bullata, but 

 is much smaller and is marked by a single columellar fold. In 

 the recent collections of the Survey it has been observed only 

 from the Navesink marl, and A. bullata, only from the Merchant- 

 ville, although some specimens of the latter species in the col- 

 lections of the Philadelphia Academy of Science are apparently 

 from the Navesink. 



