MIOCENE MOLLUSCA AND CEUSTACEA. 103 



smaller and more numerous. It resembles, in the form of the exposed por- 

 tions of the inner volutions, J5. canaliculatum most nearly, but is entirely- 

 destitute of any channel between the volutions, as in that species. 



Locality: The only examples which I have seen are from the gray 

 marls near Jericho, N. J., and belong to the collection of the National 

 Museum. I have not seen Mr. -Conrad's type. 



Genus CANTHARUS Bolten. 



Cantharus Cumberlandianus. 



Plate xvn, figs. 3-6. 



Cantharus Gumberlandiana Gabb: Jour. Acad. Nat. Sci. Phila., 2d ser., vol. 4, p. 375, 

 PL lxvii, fig. 6; Heilprin: Proc. Acad. Nat. Sci., 1887, pp. 398 and 403. 



fGronia (Purpura) tridentata (F. and H.) Conrad: Gat. Mioc. Foos. Proc. Acad. Nat. 

 Sci. Phila., 1862, p. 563. 



Comp. Fusus exilis Emmons: Geol. N. Oar., 1858, p. 351, fig. Ilia, not F. exilis Conrad: 

 Miocene Foss., PL xlix, fig. 1; and Proc, Acad. Nat. Sci. Phila., 1862, p. 560. 



Mr. Gabb describes this species at some length, as follows: " Fusiform; 

 whorls five, prominent; spire not as long as the mouth; outer lip thick, 

 with about eight teeth on its inner margin, inner lip smooth and thin, a 

 large plate of enamel on the columella and a rudimentary tooth on the 

 upper end near the suture; umbilicus distinct but imperforate; canal mod- 

 erate and slightly curved; surface marked by about ten rounded, promi- 

 nent, longitudinal ribs, crossed by eighteen or twenty revolving lines, 

 between some of which exist traces of finer lines, the latter visible only on 

 well-preserved specimens. There are also visible the usual lines of growth." 



The specimen which comes to me from the collection of the Academy 

 of Natural Sciences of Philadelphia, supposed to be the type, is about one- 

 fourth longer than the figure, given by Mr. Gabb to illustrate the species. 

 It also possesses a smaller number of longitudinal ribs, but agrees with his 

 description, however, in this particular. I can find no evidence whatever 

 of the " rudimentary tooth" which he says occurs on the upper end of the 

 columella near the suture. The specimen has been mutilated and repaired, 

 the outer lip having been broken off and replaced. In doing this a fracture 

 is left at the upper angle of the aperture, which leaves the thickened junc- 



