790 CRETACEOUS PALEONTOLOGY. 



Remarks. — This species differs from T. reileyi and T. leda in 

 its more convex volutions and its stronger vertical folds which 

 are not flexuose between the sutures. The only known speci- 

 men is the type which is much crushed and imperfect. In his 

 illustration of the specimen Whitfield has made the revolving 

 lines to appear much stronger than they really are in the speci- 

 men. 



Formation and locality. — Navesink marl, Holmdel (-Whit- 

 field). 



Geographic distribution. — -New Jersey. 



Turricula leda Whitfield. 



Plate XCVII., Fig. g. 



1892. Turricula) leda AVhitf., Pal. N. J., vol. 2 (Monog. U. S. 

 G. S., vol. 18), p. 93, pi. II, fig. 7. 



Description. — "Shell fusiform, with a moderately elevated and 

 turreted spire, the apical angle oi which is somewhat less than 

 30° ; volutions five or six in number, flattened in the direction 

 of the spire, or very little convex on the surface, and bordered 

 on the lower margins in the cast by a distinct band, which forms 

 about one-third of the height; body volution proportionally 

 rather more convex in the middle than the others and constricted 

 below, forming a beak of moderate length; the height of this 

 volution as seen from the back of the outer lip forms, with the 

 beak, rather more than one-half of the entire length of the shell; 

 shell marked throughout by distinct vertical ridges or folds, 

 more numerous and more closely arranged on the body whorl 

 than on those above, except perhaps the apical ones, and have 

 a slight backward curvature in the middle in passing from su- 

 ture to suture; the shell also marked by spiral ridges which, on 

 the body volution, are of nearly equal strength with the vertical 

 folds, but are invisible on the other volutions in the specimens 

 used." (Whitfield.) 



Remarks. — This species differs from T. reileyi in its less 

 slender form and its proportionally shorter spire with a smaller 



