MOLLUSCA. 803 



12 of the vertical nodes may be counted on a single volution. 

 The upper side of the last volution is slightly concave between 

 the angle and the suture line, marking the probable position of 

 the notch of the outer lip, although on the cast this feature itself 

 cannot be positively traced." (Whitfield.) 



Remarks. This is a rare species and has not been met with 

 in the recent collections of the Survey. All the known examples 

 of the species are more or less fragmentary, and the characters 

 are not preserved in as satisfactory a manner as might be desired. 



Formation and locality. Manasquan marl, Farmingdale 

 < Whitfield). 



Geographic distribution. New Jersey. 



Genus CITHARA Gray. 



Cithara crosswickensis Whitfield. 

 Plate XCVIII, Figs. 20-21. 



1892. Cithara Crosswickensis Whitf., Pal. N. J., vol. 2 

 (Monog. U. S. G. S., vol. 18), p. 107, pi. 13, figs. 7-8. 



1905. Cithara crosswickensis Johns., Proc. Acad. Nat. Sci. Phil. 

 (1905), p. 26. 



Description. "Shell of moderate size or larger, subfusiform 

 or turriculate, the spire as long as or longer than the length of the 

 body volution and beak, only moderately slender, the apical angle 

 being about 30 to 35, and the number of volutions probably 

 about five; all the specimens being imperfect and mostly casts, 

 the exact number can not be determined ; body volution large in 

 proportion to the others, quite ventricose in the upper part and 

 contracted below to form the short beak; upper volutions only 

 moderately ventricose; suture, in the casts, strongly marked and 

 the volutions rather abrupt on the upper margin ; aperture large, 

 angular above, and more sharply so below; columella strong, 

 leaving a moderately large cavity by its removal, which, in the 

 most perfectly formed cast, shows evidence of a single, rather 

 strong, oblique plication on the lower part ; volutions marked by 



