ITS DRILLTA. 



Allied to D.flavidula, Lam. Upper half of eacli 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 ac'utety 

 angular. Unfigured. 



D. STOLIDA, 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. L. 41, diam. 15 mill. 



Ayulhas Bank, Cape of Good Hope. 



D. CRENULARIS, Lamarck. PI. 10, figs. 64, 63, 66, 69 ; PI. 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 

 striae; canal very short; yellowish brown, with sometimes an 

 obscure chestnut superior band, occasionally maculated with 

 chestnut. L. 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. Grijfitldi, 

 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. MAJOR, Gray. PL 9, fig. 52. 



Somewhat fusiform, dark brown, transversel}- marked with 

 white lines ; whorls nodulated in the middle, nodules white ; 

 aperture oblong, canal a little recurved. L. 43, diam. 10 mill. 



Habitat nnii 



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. jlavidula. 



