DRILLIA. 185 
brown, the ribs rubbed white; canal short, sinus of outer lip 
moderate, rather broadly rounded. UL. 17, diam. 6 mill. 
Monterey, Cal. 
Described from a single specimen. I have not seen it, but 
judging by the description and figure, it differs from D. torosa 
principally in the greater number of ribs. 
D. HempPaI.ct, Stearns. Pl. 13, fig. 49. 
Shell small, slender, polished, with a long spire and short 
aperture terminating ina short, broad, open canal; horn-colored; 
there are inconspicuous longitudinal ribs on the spire, which 
are obsolete on the body-whorl, and an impressed sutural line. 
L. 6°5, diam. 2°3 inches. 
Todos Santos Bay, L. California. 
Section Cravus, Montfort. 
Distinguished by the short, turreted form, broad base, appear- 
ing truncated below, tuberculated periphery and want of spiral 
sculpture. 
D. EcHINATA, Lam. PI. 9, fig. 31. 
Shell whitish, with chestnut longitudinal streaks, forming 
bands interrupted by the ribs, often chestnut-spotted between 
the tubercles. Length, 2 inches. W. Coast of Africa. 
PD. AURICULIFERA, Lam. PI. 8, fig. 25. 
Shell white, with a broad chestnut band below the periphery ; 
tuberculations of the periphery often long, spinose; usually a 
revolving row of nodules below the middle of the body-whorl. 
Length, 1 inch. Philippines. 
According to Deshayes this is the Strombus lividus, Linn., but 
the identification remains doubtful. 
D. EXASPERATA, Reeve. PI. 8, fig. 26. 
Shell resembling D. auriculifera in general form and coloring, 
but the tuberculations on the periphery are short and more 
numerous ; the shell is also usually heavier. Length, 21 mill. 
Mauritius (Robillard). 
D. unizonatis, Lamarck. PI. 9, figs. 38, 33,34, 30; Pl. 32, fig. 48. 
Shell nodosely plicate, smooth, or with a few close revolving 
lines at the base; whitish or yellowish white, the body-whorl 
