MIOCENE MOLLUSCA AND CRUSTACEA. 115 



44 Aperture about one-third the length of the shell; canal slightly 

 deflected, columellar lip well defined. 



" Length slightly exceeding a half inch." (Heilprin.) 



This species closely resembles Pleurotoma elegans Emmons, Geol. Surv. 

 N. Car., 1858, p. 265, fig. 146, but is more slender, more obsoletely striate, 

 and l^s the aperture much shorter in proportion to the entire length of the 

 shell. Prof. Heilprin describes it as having "no revolving lines." On most 

 of the specimens in hand there are fine spiral lines near the base of the shell 

 distinctly visible under a glass, but not to the naked eye. 



Locality and position: In the gray sandy marls of the Miocene at both 

 Shiloh and Jericho, N. J. Prom the collection of the National Museum, and 

 in that of Miss Mary S. Holmes, of Philadelphia, the latter one being the 

 type of the species, but received too late to figure. 



Genus DRILLIA Gray. 



Drillia elegans. 



Plate xxi, tigs. 2-4. 



Pleurotoma elegans Emmons: Geol. Surv. N. Carolina, 1858, p. 265. 

 Drillia elegars (Emmons) Conrad: Proc. Acad.- Nat. Sci. Phila., 1862, p. 562; Meek, 

 Check List Miocene Foss., p. 21. 



" Shell small, subturreted; whorls about nine, constricted above, orna- 

 mented by numerous longitudinal ribs, and traversed by many fine raised 

 spiral lines, which become very distinct upon the pillar lip. 



" The spiral lines are very regular and equidistant The body whorl 

 has about sixteen ribs." 



I have not seen the type specimens of the above species and am only 

 able to judge of its characters from the figures given and the description 

 which accompanies it, consequently can not positively affirm that the speci- 

 mens which I here refer to it are specifically identical. Still I think there 

 is no reasonable doubt of the correctness of the reference. The features 

 described by the author are, perhaps, a little more pronounced on the New 

 Jersey specimens than they would appear to have been on the specimens 

 which he figures, while the line of nodes occurring above the sinus con- 



