178 DRILLIA. 
Allied to D. flavidula, Lam. Upper half of each whorl nearly 
smooth, as the plications extend scarcely beyond the central 
large spiral liration which marks the angulation of the whorls, 
Sometimes, this lira being double, the whorls are less acutely. 
angular. Unfigured. 
D. stotipA, Hinds. PI. 10, fig. 61. 
Fusiform, smooth, olive- or horn-brown; whorls depressed 
above the periphery, below it with short, whitish tubercular 
ribs ; lip sharp, with broad sinus. IL. 41, diam. 15 mill. 
Agulhas Bank, Cape of Good Hope. 
D. crENULARIS, Lamarck. Pl. 10, figs. 64, 63, 66, 69; Pl. 32, 
fig. 38. 
Abbreviately fusiform, upper portion of whorls slightly con- 
cave, periphery with the terminations of somewhat distant 
rounded ribs, separated by about equal interspaces, marked 
below the periphery by revolving lines, and intermediate fine 
striz ; canal very short; yellowish brown, with sometimes an 
obscure chestnut superior band, occasionally maculated with 
chestnut. lL. 40, diam. 14 mill. 
Tranquebar, Bombay, Singapore, Australia. 
Reeve’s figure (fig. 64) is not very characteristic, being taken 
from a very narrow, worn specimen; his D. Tayloriana (fig. 69) 
is a better representative of this narrow form. The typical 
crenularis is well represented by Weinkauff (fig. 38), and with 
it may be united D. Sumatrensis, Petit (fig. 63), and D. Griffithit, 
Gray (fig. 66). 
The species of this group are not readily distinguishable ; the 
last-named form, for example, connecting closely with D. Strom- 
boides, Sowb. 
D. magor, Gray. Pl. 9, fig. 52. 
Somewhat fusiform, dark brown, transversely marked with 
white lines; whorls nodulated in the middle, nodules white; 
aperture oblong, canal a little recurved. LL. 43, diam. 19 mill. 
Habitat unknown. 
The figure indicates a species very distinct in form and 
coloring, yet Reeve says of it: ‘‘ Very closely allied to the Pl. 
Griffithii ; indeed some authors would account it to be a variety 
of that species.””, Weinkauff makes it a synonym of D. flavidula. 
