1878.] FROM THE ANDAMAN ISLANDS. 807 



hand, is white, or very pale purple, and the aperture, the interior of the 

 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 j 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 lirse 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 costae 

 contrasting conspicuously with the pale interstices. It is consider- 

 ably 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- 



Ricinula astricta, Reeve, Conch. Icon. iii. fig. 31. 

 Hab. ? (Rve). 



14. Nassa elegans, Kiener ; Reeve, Conch. Icon. viii. pi. 2. 

 fig. 10 (not good) ; Kiener, Coq. Viv. pi. 24. fig. 97. 



Hab. Indian Ocean. 



15. Nassa crenulata, Bruguiere; Reeve, Conch. Icon. sp. 2; 

 Kiener, Coq. Viv. pi. 23. fig. 90. 



Hab. Philippines. 



53* 



