of which the 17 upper ones are rather short, the lower nearly 

 reach the shallow basal sinus. 



Alt. 22, Lat. U'/ 2 . Apert. alt. 17 1 /.,, Lat. 2'/ 4 Mill. 



Oliva dubia n. sp. 



Stat. 2. Madura-strait. 56 M. 8 Spec. 



Stat. 116. West of Kwandaug-bay-entrance. 72 M. 1 Spec. 

 Stat. 260. Frora the North point of Nuhu Jaan, Key-Islands. 

 90 M. 1 Spec. 



Shell small, cylindrically oblong, slightly narrowed towards the 

 base, very glossy, smooth, yellowish-brown, with more or less 

 waved rufous lines and on the last whorl a series of distant 

 brown blotches, bordering the suture. Spire rather high, convexly 

 conical, with a very blunt rosy apex. Whorls 5 1 /,,, the embryonic 

 ones convex, the lower ones nearly flat, slightly callous. Sutures 

 deep, widely channelled. Aperture oblong, rather blunt at the 

 upper part, gradually widening below, with a large channel above ; 

 interior violet, outer margin nearly straight, moderately thickened, 

 basal sinus wide. Columellar lip smooth above, with about 7 plaits 

 towards the base. 



Alt. 13, Lat. 4 2 / 3 ; Apert. alt. 10'/ 2 , Lat. 1'/, Mill. 



I have named this species dubia because it has a somewhat 

 juvenile appearance, as however the specimens of the 3 localities, 

 vary little in size and shape, it may also be that no larger speci- 

 mens exist. 



Oliva ceramensis n. sp. 



Stat. 174. Waru-bay, North Coast of Ceram. 18 M. 5 Spec. 



Shell small, cylindrically-ovate, slightly swollen near the upper 

 part, glossy, smooth, with concentric gray and yellow zones, marked 

 by a purple-brown network, with darker triangular spots. Spire 

 very short, apex dark brown, the spire quite or nearly concealed 

 by a callous deposit. Number of whorls unknown, on account of 

 the callosity. Sutural channel wide but not deep. Aperture oblong, 

 nearly straight above and near the middle, curved and widened 



