DRILLIA. 185 



brown, the ribs rubbed white ; canal short, sinus of outer lip 

 moderate, rather broadly rounded. L. IT, 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. HEMPHILLI, Stearns. PL 13, fig. 49. 



Shell small, slender, polished, with a long spire and short 

 aperture terminating in a 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 CLAVUS, 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. 



D. AURICULIFERA, Lam. PL 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 Desires this is the Strombus lividus, Linn., but 

 the identification remains doubtful. 



D. EXASPERATA, Reeve. PL 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. UNIZONALIS, Lamarck. PL 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 



