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Show 208 MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. [Feb. 18, broad swollen varix externally, thin at the margin, armed within with about six subtubercular 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; canal distinct, faintly reflexed. Length 11 millims., diam. 3|. Hab. Station 27. Compared with G. 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 the 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 11 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 obtained. 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 with violet. The rest are flattish, smooth, of a transparent white colour, painted with close longitudinal olive-brown lines, interrupted by two broad trans- |