128 PALEONTOLOGY OF NEW JERSEY. 



Family TURHITELLID^E. 

 Genus TURRITELLA Lamarck. 



TlJRRITELLA .EQUISTRIATA. 



Plate xxiii ? figs. 12-14. 



Turritella cequistriata Conrad; Proc. Acad. Nat. Sci. Phila., 1862, p. 584; Oat. Mioc. 

 Foss. Atlantic slope, in Proc. Acad. Nat. Sci., 1862, p. 567; Meek, Check List 

 Miocene Foss., p. 16. 



" Subulate, volutions fourteen, bicarinate, carina distant with a con- 

 cave interval, the lower carina near the suture; surface covered with nearly- 

 equal fine closely-arranged striae, with a minute intermediate line; aperture 

 longer than wide." 



The above is Mr. Conrad's description of this species. The shell is 

 extremely variable in the rate of increase in size in different individuals, 

 and also somewhat so in the general expression of the volutions, owing to 

 the comparative distance between the two principal carina, and their dis- 

 tance from the suture. But they all agree by having the carinse much 

 nearer the lower part of the exposed surface of the volution than to the 

 upper, which gives a long slope from the upper one to the suture line above; 

 usually greater than the distance between the two carinse ; while the space 

 below the lower carina is not more than half as wide as that between the 

 carinse. In the fine lines covering the surface they are very uniform, 

 although the small intermediate line does not always appear. The lower 

 edge of the volution is either obtusely carinate or rounded, and the lower 

 surface covered with fine lines, as is the surface. In older shells the carinse 

 are less distinctly marked. The aperture is subquadrate and the apex, as 

 seen in very perfect specimens, would appear to have been open and filled 

 from within. 



Localities: All the specimens yet seen have been from Shiloh, N. J. 

 Mr. Conrad's types were from the same place. Collections at Rutgers Col- 

 lege, N. J., and National Museum, Washington, D. 0. Mr. Meek gives it 

 as from North Carolina. 



