DRILLIA. 203 
D. numitts, EK. A. Smith. Pl. 11, fig. 4. 
Whorls strongly excavated above, with granules beneath the 
suture, periphery nodulous, below which are nine oblique longi-e 
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. opriquata, Reeve. PI. 11, fig. 1 (2). 
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 striz at the base. Length, 14 mill. 
Persian Gulf, Ceylon, Singapore, Japan. 
D. suBOBLIQUATA, Smith. PI. 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 costz more numerous, crossed by 
revolving striz (wanting in D. obliquata), the basal canal 
broader. 
D. canvEns, E. A. Smith. Pl. 11, fig. 8. 
White, shining, subpellucid; whorls eight, nuclear smooth, 
normal ones obliquely ribbed, with here and there fine spiral 
strie 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. PI. 11, fig. 7. 
Shell yellowish brown, the whorls strongly shouldered and 
closely ribbed, crossed by larger and smaller revolving striz; 
lip thick, subsuleate within ; sinus rather deep. 
Length, 13 mill. 
Bass Straits. 
