MOLLUSCA. 773 



Remarks. This species has not been met with in the recent 

 collections of the Survey, but the species is a well-marked one 

 and cannot be easily mistaken. In some respects the species is 

 intermediate in its characters between Caricella and Valuta, the 

 vertical folds upon the periphery of the shell being like the lat- 

 ter genus, while the character of the folds of the columella are 

 like the former genus. 



Formation and locality. GVlanasquan marl, Farmingdale 

 (Whitfield). 



Geographic distribution. New Jersey. 



Genus VASUM Bolten. 



Vasum conoides Whitfield. 



' 

 Plate XC., Figs. 9-10. 



1892. Vasum conoides Whitf., Pal. N. J., vol. 2 (Monog. U. 

 vS. G. S., vol. 18), p. 83, pi. 9, figs. 9-10. 



Description. "Shell rather small, regularly conoidal above 

 and below the point of greatest diameter, which is at the upper 

 edge of the body volution; spire longer than the shell below, 

 as seen from the back of the volution; and very evenly and 

 gradually diminishing; number of volutions unknown but appar- 

 ently numerous ; apical angle about 35; aperture elongate, 

 narrow, becoming pointed below, the length as given by pro- 

 jecting the spire of the shell to an imaginary apex is rather 

 less than one-third as long as the entire length of the shell; 

 columella moderately strong, marked by three proportionally 

 strong folds and indications of a smaller fourth one very near 

 the base ; surface of the cast perfectly smooth, with the excep- 

 tion of a broad sulcus marking its surface on the last volution, 

 at about one-third of the distance below the upper edge, indi- 

 cating either a thickening of the inside of the shell or a sinu- 

 osity in the outer lip." (Whitfield.) 



Remarks. This species has not been recently collected, and 

 it seems to be known only from the type specimen. In the 



