1 92 H. B. Preston : New species of She/ Is. [Vol. 11, 



Closely allied to D. exasperaia, Reeve of which species the 

 locality is unknown ; it is, however^ larger and more graceful in form, 

 the aperture is narrower in proportion to the general size of the 

 shellj and it does not show the transverse^ infra-peripheral ribbing on 

 the last whorl which is very conspicuous in the type of D. exasperaia. 



Mangilia andamanensis , sp. no v. 



Shell slenderly fusiform^ pale yellowish brown, blotched here 

 and there with light chestnut ; whorls 7, convex, angled above, the 

 first two horny, the later whorls sculptured with transverse ridges 

 and fine spiral strise, presenting a finely cancellate appearance ; 

 sutures deeply impressed ; aperture oval ; outer lip varicosely 

 thickened ; sinus broad but not deep. 



Altitude . . . . 6 mm. 



Diam., major .. — ..2 ,, 



Aperture, alt. . . . . 2 ,, 



diam. . . 75 ,, 



Habitat — Andaman Islands. 



Mangilia exasperaia, sp. nov. 



Shell fusiform, pale brown, narrowly banded with a deeper 

 shade of the same colour ; whorls g, angular, convex, the first two 

 smooth, horny, polished, the remaining seven sculptured with 

 coarse, transverse, varicose ridges, crossed by spiral lirae between 

 which appear numerous fine striae ; sutures impressed ; aperture 

 elongate ; outer lip varicosely thickened. 



Altitude . . . . i6"25 mm. 



Diam., major. . . . 5-5 



Habitat — -Andaman Islands. 



Mangilia obtusa, sp. nov. 



Shell obtusely fusiform, pale yellowish white, painted on the 

 upper whorls with two thin bands of rich brown, which increase 

 on the last whorl to two sets of stripes of the sam.e colour, the 

 upper set consisting of four stripes, the lower of seven ; remaining 

 whorls 5^, rather flat, closely cancellate ; aperture ovate ; peristome 

 varicosely thickened ; sinus broad and shallow. 



Altitude . . . . 6"5 mm. 



Diam., major . . . . 2'25 ,, 



Aperture, alt. . . . . 2' 5 ,, 



,, diam. . . 75 ,, 



Habitat — Andaman Islands. 



Clalhurella malleti, Reel., var. nivea, var. nov. 



Agrees in shape and sculpture with the typical form, the 

 opaque white median band being still somewhat prominently visible 



