190 DRILLTA. 



upper part, obliquely regularly ribbed ; sinus broad ; yellowish 

 white. Length, 12 mill. 



Habitat unknown, 

 D. ROSEA, Sowb. PI. 10, fig. 62. 



Strongly plicately noduled, concave around the upper part of 

 the whorls ; outer lip somewhat wing-like, with a deep posterior 

 sinus and a slight anterior one ; pinkish brown, aperture rosy. 



Length, 26 mill. 



W. Coast of Central America, 

 D. ROSOLINA, Marrat. 



Resembles D. rosea, but is obliquely ribbed, closely striated, 

 and uniform rose-color. W. Africa, 



Unfigured. No dimensions given. 



D. ACUMINATA, Mighels. PI. 12, fig. 20 ; PL 32, fig. 41. 



Shell with a very slight angle on the periphery, with numerous 

 small ribs reaching the suture and terminating at a raised 

 revolving line on the lower part of the body-whorl ; below this 

 line are sometimes revolving striae ; livid or chocolate-brown, 

 with a white band at the suture, ribs white, aperture brown. 



Length, 10 mill. 



Sandwich Islands ; Indian Ocean (Nevill). 



D. MARIEI, Crosse. PI. 13, fig. 73. 



Shell olivaceous brown, smooth, with a pair of narrow brown 

 revolving lines below the periphery, body-whorl with one or two 

 additional colored lines, situated inferiorly, the base with a few 

 revolving striae. Length, 10 mill. New Caledonia. 



D. CLAVATA, Sowb. PL 11, fig. 95. 



Shell with a few strong longitudinal ribs, which surmount the 

 angulated periphery and reach the sutures ; no revolving sculp- 

 ture ; outer lip thickened, the sinus large and ascending, aperture 

 truncate below ; whitish, the ribs slightly stained with flesh-color 



Length, 13 mill. 



Xipixapi, W. Columbia (Cuming). 



D. PICA, Reeve. PL 13, fig. 50. 



Shell thick; whitish, irregularly variegated with a few large 

 squarish brown spots; upper portion of whorls smooth, concave, 

 below the periphery with numerous narrow ribs ; sinus broad. 



Philippines (Cuming); Mauritius (Robillard). 



