OCR Text |
Show 1878.] FROM THE ANDAMAN ISLANDS. 807 hand, is white, or very pale purple, and the aperture, the interior basal channel, and the columella, are of a uniform light purple. It is true, however, that the sculpture in both is remarkably similar. 11. COLUMBELLA (ANACHIS) NIGRICOSTATA. (Plate L. fig. 6.) Shell acuminately ovate, subturreted ; beneath a thin dirty yellowish epidermis, white, with black ribs, with a series of white spots on the costae a little above the middle of the last whorl, and with a black elongate spot or line in each of the interstices between the ribs, those towards the labrum being produced downwards to the base in a rather zigzag manner. Whorls 8, a little convex, with about 12 thinnish ribs on each. Body-whorl a little flattened or even concave at its broadest part; the ribs in front are produced somewhat below the middle ; and on the back four or five nearest the lip are developed only a short distance from the suture, leaving the whorl below them smooth. At the base it is transversely grooved, the eight or nine ridges or lirae between the sulci being spotted with black. These spots are the continuation of the colouring of the longitudinal costae. Aperture small, narrow, bluish white within ; labrum exteriorly thickened, thin at the edge and bearing about 8 tubercles within, of which the three or four upper ones are the largest; columella sub-erect, slightly convex at the middle, covered with a thin callosity, with a free margin, through which the transverse ridges which wind round the end or cauda of the whorl appear somewhat in the form of nodules. Length 12^- mill., diam. 6. This species is well characterized by its coloration, the black costse contrasting conspicuously with the pale interstices. It is considerably like C. terpsichore, Sowerby, in form and sculpture, but different in colour. 12. COLUMBELLA (ATILIA) PUELLA, Sowerby ; Reeve, Conch. Icon. xi. sp. 65. Hab. Philippines. The plicae on the back of the body-whorl are almost obsolete ; but immediately behind the labrum three are well developed and situated very close together, thus forming a very strong postlabral varix. The denticulation within the aperture consists of about eight short fine lirae. The columella is coated with a thickish enamel, and is armed with about seven fine, short, transverse lirations. 13. ENGINA ASTRICTA, Reeve. Bicinula astricta, Reeve, Conch. Icon. iii. fig. 31. Hab. 1 (Bve). 14. N A S S A E L E G A N S , Kiener; Reeve, Conch. Icon. viii. pl. 2. fig. 10 (not good) ; Kiener, Coq. Viv. pl. 24. fig. 97- Hab. Indian Ocean. 15. N A S S A C R E N U L A T A , Bruguiere; Reeve, Conch. Icon. sp. 2; Kiener, Coq. Viv. pl. 23. fig. 90. Hab. Philippines. 53* |