802 CRETACEOUS PALEONTOLOGY. 



filling of the aperture which nearly equals one-half the height of 

 the entire cast, and is very oblique as seen in front, but from 

 the back appears rather patulose and spreading; surface of the 

 cast marked by numerous vertical folds or plications, which are 

 quite distinct on the cast and closely arranged ; the outer half of 

 the last volution, however, does not retain them so distinctly." 

 (Whitfield.) 



Remarks. This species resembles M. naticella, but it is more 

 elongate, with a higher spire, more loosely coiled volutions and 

 a much broader umbilicus, as indicated by the width of the um- 

 bilical cavity in the cast. 



Formation and locality. Navesink marl, Atlantic Highlands 

 (108), Crosswicks Creek (Whitfield). 



Geographic distribution. New Jersey. 



Family PLEUROTOMIDAE. 



Genus PLEUROTOMA Lamark. 



Pleurotoma farmingdalensis Whitfield. 



Plate XCVIIL, Figs. I&-IQ. 



1892. Pleurotoma farmingdalensis Whitf., Pal. N. J., vol. 2 

 (Monog. U. S. G. S., vol. 18), p. 185, pi. 23, figs. 3-4. 



Description., "Shell of medium size, with an elongated, tur- 

 reted spire, composed of numerous angularly ventricose volu- 

 tions, which ascend rapidly, the entire number unknown; apical 

 angle about 30 ; body volutions proportionally larger than those 

 above, contracted below and rapidly decreasing in diameter, 

 terminating in a short anterior beak, the length of which is not 

 known ; periphery biangular on the outer two-thirds of the body 

 whorl, as seen on the cast; columella slender, smooth; aperture 

 moderately large ; outer lip straightened along the middle ; volu- 

 tions marked on the angle by short, oblique, vertical plications or 

 elongated nodes, which are directed slightly forward below, and 

 are confined to the larger part of the volution on all above the 

 last one, where they are slightly visible on the lower angle. About 



