834 CRETACEOUS PALEONTOLOGY. 



outer side of the U-shaped tube; often in the space between the 

 rows O'f nodes the ribs are more or less obsolescent. Sutures 

 essentially unknown. 



Remarks. — The fragmentary condition of all the examples of 

 this species which have been observed makes it very difficult to 

 determine just what its form has been; if all the parts which 

 have been observed really belong tO' a single species it must have 

 been very variable in the curvature of the shell and in the orna- 

 mentation. The type of the species is a nearly complete spiral 

 coil, but most of the later specimens which have been collected 

 are U-shaped. The species was doubtless one which passed 

 through several distinctly different forms of growth and cur- 

 vature, being similar in this respect to^ the H. simplicostata 

 Whitf., already mentioned. The species is perhaps really more 

 closely allied tO' H. angulatum M. & H.,^ than to any other, but 

 this species also is known only from fragments 



Formation and locality. — Navesink marl, Atlantic Highlands. 

 (io8). 



Geographic distribution. — New Jersey. 



FamUy TURRILITIDAE. 



Genus Turrilites Lamark. 



Turrilites pauper Whitfield. 



Plate CVIIL, Figs. 1-4. 



1892. Turrilites pauper Whitf., Pal. N. J., vol. 2 (Monog. U. 

 S. G. S., vol. 18), p. 268, pi. 45, figs. 1-5. 



Description. — Shell with the coils in close contact, the volu- 

 tions higher than wide, with a moderately wide umbilical open- 

 ing in the cast, the living chamber occupying a little more than 

 one full volution; upper edge of the volutions angular externally 

 where they meet the next succeeding volutions above, within the 

 angle the surface in contact with the next volution above is con- 



' Meek, Inv. Cret. and Ter. Foss. Up. Mo., p. 484, pi. 21, figs. 3 a-c. 



