696 CRETACEOUS PALEONTOLOGY. 



1898. Turritella quadrilira Johns., Proc. Acad. Nat. Sci. Phil. 



(1898), p. 463. 

 1905. Turritella quadrilira Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 21. 



Description. — Apical angle about 20"" ; the figiired specimen is 

 the apical portion of a shell 19.5 mm. in length, with a maximum 

 diameter of 8 mm., showing nine volutions. Suture situated a 

 little above the middle line of a broad, smooth, depressed, con- 

 cave channel whose lower slope is less abrupt than the upper, 

 and whose width is more than one-half the width of the elevated 

 portion of the volutions. Surface of the volutions between the 

 sutural depression, a little convex and marked by four strong, 

 angular, revolving ribs, the uppermost of which is slightly smaller 

 than the others; the interspaces between the ribs are broader 

 than the ribs themselves, smooth and rounded in the bottom. 



Remarks. — This species has a slight resemblance to T. tri- 

 costata from the Wenonah sand, but so far as known, it is a 

 much smaller shell with a somewhat greater apical angle. If it 

 should be found, however, growing to sO' large a size as the 

 Wenonah species, it can be easily distinguished by its four re- 

 volving ribs and the convex surface of the volutions between 

 the sutural depressions. 



Formation and locality. — Cliffwood clay, Cliffwood Point 

 (105), near Matawan (107); Woodbury clay, near Matawan 

 (103), deep well at Mount Laurel (Johnson). 



Geographic distribution. — New Jersey. 



Turritella 7 granulicosta Gabb. 



Plate LXXIX., Figs. 15-17. 



1861. Turritella gramdicosta Gabb, Proc. Acad. Nat. Sci. Phil. 



(1861), p. 363. 

 1864. Turritella granulicostata Meek, Check List Inv. Eoss. N. 



A., Cret. and Jur., p. 18. 

 1868. Turritella granuUcostata Con., Cook's Geol. N. J., p. 729. 

 1892. Turritella ? gramdicostata Whitf., Pal. N. J., vol. 2 



(Monog. U. S. G. S., vol. 18), p. 144, pi. 18, figs. 



lO-II. 



