276 Mr. Swainson's Monograph 



In general appearance this new species is closely allied to A. 

 Candida, in its slender and semi-cylindrical sliape, and in the 

 . wideness of the basal part of the aperture ; like that, also, it has a 

 deep sulcated groove, which margins the upper part of the varix, and 

 the belts and sculpure in both are the same ; but here the similarity 

 ceases, for (still carrying on the comparison) this shell has a 

 smaller aperture, and a shorter varix; and the outer lip, instead of 

 being smooth, has a mucronate projecting tooth; the colour of the 

 shell is fulvous, with a white band round the suture ; the varix is 

 also white, but the aperture brown. The slenderness of its shape, 

 and the effuse form of the aperture, at once distinguish it from all 

 the following species. Length ^-J of an inch. 

 Inhabits Mus. nos. 



3. Ancillaria albifasciata. Sp. Nov, Mihi, 



A. tests ohlonga, fuivS ; spiree hasi albifasciata ; columella! basi brevi, 



valiU oblique) ; labio extemo unidentato. 

 Shell oblong, fulvous; base of the spire with a white band; base of the 



pillar short, very oblique; outer lip one-toothed. 



Shell scarcely an inch long, of an oval oblong shape, and bright 

 bufF-coloured yellow, having a white band on the body whorl, or at 

 the base of the spire ; the columella is also white, and the base is 

 short, much thickened, and takes a more oblique direction than in 

 the next species ; the belts are double, each margined by two 

 parallel impressed lines, the upper of which terminates in a pro- 

 jecting obtuse tooth at the base of the outer lip. In old specimens 

 the lines of growth will sometimes form elevated striae, which might 

 lead students to believe that such shells belonged to a different 

 species. 



Ancillaria albifasciata has probably been overlooked, as a va- 

 riety of the following species, from which, however, it may be 

 known by its much smaller size, by the aperture being more effuse, 

 and the columella shorter, thicker, and more oblique ; by being 

 yellow, instead of deep chestnut, and by not having the two basal 

 lines followed by white bands. Mrs. Mawe has received this spe- 

 cies from the East Indies. 



