208 MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. [Feb. 18, 



broad swollen varix externally, thin at the margin, armed within with 

 about six subtnbereular lirations ; columella very little oblique above, 

 slightly convex, more inclined below the middle, invested with a very 

 thin callous deposit, united above to the outer lip and not obscuring 

 the oblique sulci around the caudal end of the whorl j canal distinct, 

 faintly reflexed. 



Length 11 millims., diam. 3|. 



Hab. Station 27. 



Compared with C. alabastrum, Reeve, its nearest ally, this species 

 is more elongated, has more numerous and shorter whorls, and is 

 differently coloured. The brown maculations extend from suture to 

 suture, and gradually increase in size as the whorls enlarge. On the 

 base of the last whorl there are a few longitudinal streaks of the same 

 colour. 



63. CoLUMBELLA (Atilia) niveomarginata. (Plate XX. 

 fig. 42.) 



Shell elongate, greyish white, with an opaque white band spotted 

 with brown at the top of the whorls, and a narrower one around the 

 middle of the last whorl, the rest of the surface being marked 

 with opaque white in an irregularly closely reticulating manner. 

 Volutions 8-9 ; the apical ones smooth, the one or two succeeding 

 longitudinally costate, the rest almost flat, separated by a deep 

 suture, so that the spire appears somewhat turreted ; body-whorl 

 tranversely sulcate below the middle. Aperture small, occupying 

 rather more than two fifths of the whole length of the shell, whitish 

 within ; labrum with an exterior varicose thickening and five or six 

 small tubercles within, of which the uppermost is the largest ; the 

 margin near tlie upper extremity is faintly sinuated ; columella 

 suberect above, oblique below the middle, where there is a small notch 

 or oblique groove, coated with a callosity with a thickened margin ; 

 canal short, recurved. 



Length 1 1 millims., diam. 3|^. 



Hab. Station 8. 



The brown markings upon the opaque white zone at the upper 

 margin of the whorls are small and in the form of somewhat irregular 

 oblique short lines or stripes, some of them here and there being 

 more like a blotch or irregular spot. The band at the middle of the 

 last whorl is only half as broad as that above ; and the spotting 

 upon it is also paler and closer. Only a single specimen was ob- 

 tained. 



64. CoLUMBELLA (AtILIa), Sp. 



Hab. Stations 1 and 30. 



The two specimens of this species, which, I believe, is undescribed, 

 are both of immature growth. They consist of eight whorls, whereof 

 the three uppermost are glassy and faintly tinged wiih violet. The 

 rest are flattish, smooth, of a transparent white colour, painted with 

 close longitudinal olive-brown lines, interrupted by two broad trans- 



