DRILLIA. 205 



D. VARICOSA, Reeve. PL 12, fig. 17. 



Whorls smooth near the suture, longitudinally ribbed below, 

 with large rude scattered varices, sinus broad and rather deep ; 

 ribs grayish on a darker surface, sometimes entirely brown. 



Length, 1 inch. 



Philippines, Australia. 



Notwithstanding some differences in the descriptions, I think it 

 probable that this species is identical with D. Japonica, Lischke ; 

 if so, the latter name will become a synonym. 



D. ALBICOSTATA, Sowb. PL 13, fig. 57. 



Rose-colored, the longitudinal ribs white, close-set, no spiral 

 sculpture ; aperture callous above ; sinus rather deep. 



Length, 22 mill. 



Galapagos Islands. 



D. SOLOMONENSIS, E. A. Smith. PL 12, fig. 23. 



Differs from D. varicosa in being narrower, with angulated 

 ribs, longer and narrower aperture and canal, and in color, 

 having dark brown stripes between the ribs, and a series of 

 brown spots on an infrasutural keel. Length, 23 mill. 



Solomon's Isles (Brazier). 



Sometimes slightly varicose. 



D. PYRAMIDATA, Kiener. PL 12, fig. 34 ; PL 13, fig. 67. 



Shell Cerithiiform, strongly corded on the periphery, smooth 

 above it, except a narrow granulated sutural band, below with 

 oblique slight ribs and revolving striae ; chocolate, the peripheral 

 and sutural nodes whitish ; interior chocolate, with a white band. 



Length, 1 inch. 



W. Africa. 

 D. OBELISCUS, Reeve. PL 12, fig. 21. 



Shell stouter than the preceding species, lower portion of the 

 last whorl granosely ridged; canal short; sinus large ; whitish, 

 covered with a yellowish olive epidermis. Length, 1 inch. 



Habitat unknown. 

 I have not seen this species. 



D. WILMERT, E. A. Smith. PL 12, fig. 24. 



Sharply keeled and noduled on the periphery, with revolving 

 striae below it, stronger towards the base ; whitish, stained with 



