MOLLirSCA OF THE ' CHALLENGEE ' EXPEDITIOIT. 365 



glassy wMte, witli some brown stains vaguely linear. S^ire bigh, 

 conical, scalar. ^/)e.r small, consisting of 3 1 depressedly globose, 

 glossy, keeled, embryonic whorls. Wliorls 9 to 10, horizontally 

 shouldered, angulated, cylindrical, with a short, rounded, and con- 

 tracted base. Suture marginated and slightly constricted. Moioth 

 round, sharply pointed above. Outer lip rounded on the edge 

 and narrowly reverted, straight above, rounded at the base, more 

 or less patulous throughout ; the canal has a reverted, flanged 

 margin. Inner lip convex on the body, concave in the middle, 

 straight on the pillar ; the labial glaze, which is very glassy, spreads 

 broadly and undefinedly on the body, and projects with a narrow 

 prominent edge down the pillar, which has a flanged and twisted 

 point. H. 0-78. B. 0-39. Penultimate whorl, height O'lG. 

 Mouth, height 0-38, breadth 0'22. 



It is quite possible this may prove to be only a deep-water 

 variety of that very variable species, N. glans, L. ; but it so dif- 

 ferent that it is impossible to place it in that group, and, indeed, 

 Mr. Marrat connects it with a different section altogether. 

 There is no form which unites the polish and the exquisite sculp- 

 ture of this species. 



3. Nassa betchia, n. sp. (l3pvxios, belonging to the deep sea.) 

 St. VIII. Feb. 12, 1873. Lat. 28° 3' 15" N., long. 17° 27' W. 

 OS Gromera, Azores. 620 fms. Mud, shells. 



Shell. — Strong, coarse, dirty white, ovate, rather stumpy, with 

 a conical subscalar spire, a small blunt apex, a round truncated 

 base, a very short pillar, and scarcely any suout. Sculpture. 

 Longitudinals — the whorls are crossed by blunt, narrow, sparse, 

 sinistrally oblique riblets, which continue to the snout ; the last 

 forms a strong varix on the edge of the lip ; the lines of growth 

 are fine, but towards the mouth become coarse. Spirals — below 

 the suture is a slight shoulder formed by a row of coarse, depressed 

 tubercles marking the upper end of the riblets; on the upper 

 whorls there are 2 to 3, on the body about 5, coarse, shallow 

 furrows parted bybroadish flat bands ; on the base there are 6 of 

 these furrows with narrower bands ; round the base of the pillar 

 winds obliquely a shallow furrow, with a slight sharpish band in 

 front ; the short pillar is scored with the old contorted canal-scars. 

 Colour a dirty porcellaneous yellowish white. Spire rather short, 

 conical, subscalar. Apex blunt and rounded, consisting of 3| 

 smooth, depressedly turbinate whorls, of which the tip is very 

 small. Whorls 9, conical, scarcely convex, not constricted below. 



