DRILLIA. 203 



D. HUMILTS, E. A. Smith. PL 11, fig. 4, 



Whorls Strongly excavated above, with granules beneath the 

 suture, periphery nodulous, below which are nine oblique longi- 

 tudinal ribs, the body-whorl is striate towards the base only; 

 yellowish brown, with a rather broad chocolate central band, 

 ribs tipped with white. Length, 9 mill. 



Japan. 



Said to resemble a dwarfed D. obliquata, Reeve, but has fewer 

 volutions and the apical ones much larger, the form is less robust 

 and the coloring is different in detail. 



D. OBLIQUATA, Reeve. PL 11, fig. 1 (*). 



Yellowish brown, within and without, with a narrow lighter 

 band on the periphery, and sometimes a row of white dots on 

 the ribs a little below the middle of the body-whorl ; a few 

 revolving striae at the base. Length, 14 mill. 



Persian Gulf, Ceylon, Singapore, Japan. 



D. SUBOBLTQUATA, Smith. PL 11, fig. 100. 



Shell horny brown, with a narrow white band at the periphery, 

 and a second subinterrupted one on the body-whorl below the 

 middle. Length, 18 mill. 



Japan. 



More slender than D. obliquata, the upper concave portion of 

 the whorls narrower, the costae more numerous, crossed by 

 revolving striae (wanting in D. obliquata), the basal canal 

 broader. 



D. CANDENS, E. A. Smith. PL 11, fig. 8. 



White, shining, subpellucid ; whorls eight, nuclear smooth, 

 normal ones obliquely ribbed, with here and there fine spiral 

 striae requiring a glass to make them out ; lower part of body- 

 whorl obliquely grooved ; sinus very wide and deep. 



Length, 12 mill. 



Japan. 

 D. DENSEPLICATA, Dunker. PL 11, fig. 7. 



Shell yellowish brown, the whorls strongly shouldered and 

 closely ribbed, crossed by larger and smaller revolving striae; 

 lip thick, subsulcate within ; sinus rather deep. 



Length, 13 mill. 



Bass Straits,. 



