744 CRETACEOUS PALEONTOLOGY. 



Pyropsis septemlirata Gabb. 



Plate LXXXVL, Pigs. 8-10; Plate LXXXIVIIL, Pigs. 1-4. 



i860. Cancdlaria septemlirata Gabb, Proc. Acad. Nat. Sci. PhiL 



(i860), p. 94, pi. 2, fig. 10. 

 1861. Cancellaria septemlirata Gabb, Synop. Moll. Cret. Form., 



p. 98 (42). 

 1864. Cancellaria ? septemlirata Meek, Check List Inv. Eoss. 



N. A., Cret. and Jur., p. 19. 

 1868. Cancellaria ( ?) sepiemeirata Con., Cook's Geol. N. J., p. 



729. 

 1876. Pyropsis septemlirata Gabb, Proc. Acad. Nat. Sci. PhiL 



(1876), p. 285. 

 1892. Pyropsis {Rapa ?) septemlirata Whitf., Pal. N. J., vol. 2 



(Mono'g. U. S. G. S., vol. 18), p. 44, pi. 3, figs. 4-8. 

 1905. Pyropsis septemlirata Johns., Proc. Acad. Nat. Sci. PhiL 



(1905), p. 24. 

 1892. Pyropsis {Rapa ?) Corrina Whitf., Pal. N. J., vol. 2 



(Monog. U. S. G. S., voL 18), p. 45, pl- 3> %s. 1-3. 



Description.- — ^The dimensions of a nearly complete internal 

 cast are: height of specimen as preserved, 42 mm.; probable 

 total height, 47 mm. ; maximum diameter of the outer volution, 

 33.5 mm. Shell with about three voltitions, the spire low, the 

 suture canaliculate with a wide and deep, subrectangular depres- 

 sion. Outer volution gibbous above, abruptly contracted and 

 produced into a long anterior canal below, the upper half of the 

 gibbous portion much more strongly convex than the lower half. 

 Surface marked by strong revolving costse or ridges, about eight 

 or ten in number, separated by much broader depressions, the 

 first ridge borders and slightly overhangs the deep sutural depres- 

 sion, the second and perhaps others are somewhat nodose, and 

 all are more or less rugose because of the rather coarse trans- 

 verse lines of growth. The surface of the internal casts is smooth, 

 with four or five rather obscure revolving angles, and with a 

 broad, sutural cavity. 



Remarks. — Casts of this species are not uncommon in the 

 Navesink horizon at Mullica Hill. The characters of the outer 



