REPORT ON THE GASTEROPODA. 491 



hyaline. Spire high, narrow, and conical. Apex: the spire terminates abruptly, and on 

 one side there rises the two-whorled embryonic tip, which is shaped like that of a Clausilia, 

 being bluntly and obliquely drawn out, but it is turned over quite on one side, and half 

 sunken in the first regular whorl. Whorls 7 ; they are nearly flat, but look slightly 

 convex from the longitudinal ribs becoming slightly feeble near the suture. Suture linear, 

 barely impressed, oblique. Mouth small, oval, pointed above. Outer lip thiu, direct, 

 rounded and patulous in front. Inner lip thin, bluntly angulated at the top of the 

 pillar, where it is direct, thin, and expanded, with a small furrow behind it. H. 0*095 in. 

 B. 0-03. Mouth, height 0-022, breadth 0-018. 



This species differs from Odostomia philomelw, Wats., in form, in size, and in growth, being far 

 smaller to a larger number of whorls. From Odostomia indistincta and Odostomia intcrstincta it differs 

 in style of ribbing, but above all in the apex, which in both of these is simply (though differently) 

 introverted. 



21. Odostomia {Turbonilla) rhabdota, 1 n. sp. (PI. XXXII. fig. 4). 



Station 24. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" W. Off Culebra 

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Shell. — Strongisb, high and narrow, conical, brilliant, fluted, with a small semi-globose 

 half-reversed sinistral tip, flat-sided whorls, a slightly impressed suture, a flatly rounded 

 and hardly produced base, and a small narrowly oval (?) mouth. Sculpture: besides 

 extremely fine and faint lines of growth, there are on each whorl about 14 ribs, which 

 run from whorl to whorl continuously and nearly direct 2 down the whole spire ; they 

 are broad, but on their crest a little pinched up, and are parted by shallow rounded 

 furrows of double their width ; they stop abruptly at the edge of the base. Spirals — 

 none. Colour translucent white. Spire high, narrow, and conical. Apex narrows 

 gradually to a very fine top, on which the embryonic tip lies on its side ; that tip, 

 consisting of 1\ whorls, is semiglobose, and the extreme point, which is not very small, 

 projects slightly beyond the contour line of the spire. Whorls (exclusive of those of the 

 embryo) 9, of very slow and regular increase, flat to barely convex on the sides ; the last 

 is slightly elongate, with flatly rounded scarcely produced base. Suture distinct, and a 

 little impressed. Mouth small, seemingly narrowly oval (but somewhat broken), narrowed 

 and pointed above, and slightly pointed at the front of the pillar. Outer lip thin, direct, 

 straight, patulous on the base. Inner lip obtusely angled at the top of the pillar, down 

 which it runs direct and there it is rounded over and appressed. H. 0'18 in. B. - 04. 

 Mouth, height 0-037, breadth 0'024. 



This is a much smaller and more delicate form than Odostomia rufa, Phil., with a less square 

 base and different sculpture. It may, perhaps, approach to Odostomia nivea, Stimpson, which is an 



1 gafibaiTos, fluted. - Hence the name. 



