222 TRANSACTIONS OF THE WAGNER FREE 



whorl is thickened in front of the appressed suture, and yet not distinctly 

 to form a thread ; the spirals are most distinct near the pillar; transverse 

 sculpture of (about nine on the body-whorl) well-marked, prominent ribs, 

 extending on the early whorls from suture to suture, and rather wide incre- 

 mental lines, sometimes pleated at the suture; anal fasciole not constricted, 

 obscure, with a shallow notch ; pillar distinct, with a well-marked siphonal 

 fasciole; internally with a smooth enamel reflected over it; aperture narrow; 

 canal recurved, deeply notched ; outer lip thin, arched, simple, varicose be- 

 hind, smooth within. Lon. of shell 21.5; of last whorl ri.3; of aperture 

 8.4; max. lat. of shell 8.0 mm. 



Variety oxia. Plate 14, figure i b. 



This differs from the type in having twelve instead of nine ribs, the 

 sculpture sharper, showing about seven primary spirals, the much wider 

 interspaces with six or seven microscopic, nearly equal, threads in each ; 

 and the spire shorter in proportion. It is from the beds of the Cape Fear 

 River, collected by Mr. C. W. Johnson. More material may prove it to be 

 distinct. The length of the specimen is 16.0 mm. 



The species as a whole is marked by its obsolete sculpture, which looks 

 as if it had once been strong, but had, while soft, been patted flat. The shape 

 of the early whorls recalls D. hoplopliorus ; the sculpture suggests the follow- 

 ing species, from which, however, the very much larger nucleus of D. aphani- 

 toma at once distinguishes it. 



Drillia schismatica n. s. 

 Plate 14, figure i. 



Pliocene of Shell Creek, Florida, Willcox. 



Shell elongated, with a sharp-pointed spire, smooth two-whorled nucleus 

 and nine later whorls ; nucleus very small, followed by one whorl with large, 

 very oblique, smooth transverse ribs and no spiral sculpture ; later whorls 

 with two sorts of spirals, the primaries strong, one in front of the suture, two 

 at the periphery, one behind the suture or covered by it, and on the last 

 whorl five or six more anteriorly; the rest of the shell, including the anal 

 fasciole (except the canal), is covered with small, sharp, distinct, equal spiral 

 threads, of which on the body there are four or five between the primaries ; 

 there are six secondaries on the anal fasciole and sometimes two or three be- 

 tween the ante-sutural primary and the suture; transverse sculpture of 11-12 

 well-marked riblets, with about equal interspaces, overridden by the spirals and 

 strongest at the shoulder; anal fasciole well marked, depressed, flattish ; aper- 

 ture moderately wide, with a short, wide canal, well-marked siphonal fasciole 

 and smooth, callous inner lip; anal notch rather shallow, outer lip smooth 

 inside, simple or slightly crenulate by the primaries. Lon. of shell 20.5 ; of 

 last whorl 11. o; of aperture 7.5 ; max. lat. of shell 7.0 mm. 



