DRILLIA. 187 
D. formosa, Reeve (PI. 11, fig. 87, double natural size), 
appears to be identical; it comes from the Philippine Islands. 
D. HEXAGONA, Sowb. PI. 9, fig. 35. 
Shell sharply pyramidal, reddish brown, whorls hexagonal, 
very finely striated, ribbed-tuberculated, the ribs six on each 
whorl; sinus broad. Length, 23 mill. 
Guacomayo, Central America (Cuming). 
Dr. Weinkauff’s figure of this species is not at all character- 
istic, and resembles D. Beckii, Reeve. 
D. potyGonais, Weinkauff. Pl. 9, fig. 45. 
Whorls nine, contracted above, convex on the middle, with 
longitudinal, curved nodulose ribs ; white, with a chestnut band ; 
canal very short, broadly emarginate at the base. 
Length, 14 mill. Zanzibar. 
Said to resemble closely D. unizonalis, but to be much smaller 
and more slender, with more numerous whorls. 
D. Aneast, Crosse. Pl. 9, figs. 37, 36, 
Shell brownish olivaceous, whorls about nine, the embryonal 
whorls smooth, the others with from seven to ten short longitu- 
dinal costz forming a tuberculated shoulder, surface often with 
minute revolving strix ; aperture chestnut-brown. 
Length, 11-13 mill. 
Port Jackson, Australia; Tasmania. 
Having received this species from several collectors and con- 
chologists I find considerable variation in the number of ribs 
and in the proportions of the shell, some having a longer spire 
and narrower form even than the figure of D. Angas, whilst 
others are short and stout, as in the form called by Crosse D, 
Beraudiana (tig. 36); sometimes there is a brown band below 
the middle of the body-whorl. 
D. mepiocris, Deshayes. PI. 9, fig. 41. 
Whorls eleven, nodosely plicate in the middle, the body-whorl 
with revolving striz towards the base; flesh-brown, with a cen- 
tral interrupted narrow chestnut band, base broadly chestnut- 
banded. Length, 11 mill. 
Isl. of Bourbon. 
Described from a single specimen—which I have not seen. 
