220 TRANSACTIONS OF THE WAGNER FREE 



Conus adversarius Conrad. 



Part i. p. 26. 



Specimens obtained by Mr. Willcox in North Carolina show that the 



obliquity of the spire varies, and though it is usually more oblique than in 



Conrad's figure, occasionally it is found revolving in a nearly horizontal plane 



as he represented it. 



Family PLEUROTOMID^ (supplementary). 

 Genus DRILLIA Gray. 

 Drillia tuberculata Emmons. 

 Pleurotoma tuberculata Emmons, Geol. N. Car., p. 265, fig. 147, 185S. 



Pliocene of the Croatan and Waccamaw beds in North and South Caro- 

 lina, Johnson. 



This species recalls /?. A7/ctfr}';y/fl Dall.but it is proportionately stouter. 

 It is readily recognized by three or four stout spiral threads, without trans- 

 verse sculpture, which characterize the first whorl of the shell, following the 

 smooth nucleus of a single turn. There are seven or eight shouldered ribs on 

 the body-whorl in front of the anal fasciole, which is finely spirally threaded, 

 with one strong spiral between it and the suture, which is usually closely 

 appressed. 



Drillia myrmecoon n. s. 

 Plate 14, figure 2. 

 Drillia eburnea Dall, part i. p. 30, 1890, not of Conrad. 



Pliocene (?) of the Cape Fear River, North Carolina, Johnson ; of the 

 Caloosahatchie beds, Florida, Dall. 



Shell small, rather stout, elongate ovate or pupiform, of seven or eight 

 whorls ; nucleus blunt, smooth, large, of about one whorl followed by a 

 whorl recticulately sculptured, the spirals smaller and uniformly closely set, 

 the transverse sculpture of slightly larger, concavely arcuate riblets ; on the 

 body of the shell the spiral sculpture consists of rounded, strong threads, 

 three on the periphery and one between the suture and the anal fasciole; the 

 latter has one smaller thread behind it and two on the fasciole in front of it ; 

 on the body-whorl there are nine or ten strong spirals alternating with finer 

 ones beside those on the pillar ; transverse sculpture of (on the body-whorl 

 nine) well-marked ribs with wider interspaces, strongest near and behind the 

 periphery and evanescent anteriorly ; aperture short, narrow ; pillar short, 

 stout; pillar lip callous, smooth; canal wide, very short, not recurved; anal 

 notch shallow; outer lip slightly thickened, smooth inside. Lon. of shell 

 10; of last whorl 5.5 ; of aperture 3.5 ; max. lat. of shell 3.5 mm. 



Worn and immature specimens of this species were identified by me 

 in the first part of this paper with Conrad's D. eburnea — an error which the 



