392 THE VOYAGE OF H.M.S. CHALLENGER 



slightly more crowded on the hase ; the second, third, and fourth feebly carinate the body- 

 whorl ; between them lie 3 or 4 slighter rounded threads, which do not form tubercles on 

 the ribs ; below these on the base are 6 other spirals, with a similar feebler spiral between 

 them, while on the snout there are about 9 pretty equal, close-set, rounded threads which 

 run parallel with the open slit of the canal. Colour porcellanous white, with chestnut on 

 the larger spiral threads. Epidermis of a pale ruddy browu, thin, rising along all the 

 spirals into distinct short, sharp bristles, which are set on small round tubercles. Spire 

 high and rather narrow, scalar, conical, but with its profile lines broken by the contracted 

 suture. Apex consists of four polished, but spirally threaded, white, turbinated whorls, 

 of which the first is extremely small and somewhat immersed. Whorls, 8 to 9 in all ; 

 they have a sloping fiat shoulder to the second spiral, below which they are cylindrical and 

 ' scarcely convex ; the last whorl is more tumid and rounded than the others, but is very 

 much and rapidly contracted to the rather small, longish, sharply conical, lop-sided, and 

 reverted snout, which, viewed from above, projects to the left from the right side of the 

 base. Suture interrupted by the ribs and scarcely at all impressed, but strongly defined 

 by the long sloping shoulder below it ; on the embryonic whorls it is slightly channelled. 

 Mouth almost round, but a little angulated and slightly distorted ; a long, straight, and 

 very narrow slit of a canal runs out of it toward the left, neither narrowing nor widening 

 from the place where it leaves the mouth ; its sinistral inclination seems to give the whole 

 snout a turn to the left. Outer lip : its semicircular curve is a little flattened ; at the 

 point of the mouth it turns quickly and runs quite straight to the point of the snout, 

 where it is a little obliquely cut off; the edge is sharpish, but with a tendency round the 

 mouth to become double, in the form of an outside and an inside lamella parted by a 

 minute shallow furrow ; it is thickened outside by the slightly remote, narrowish, rounded, 

 almost scrobiculated 1 varix, which on the snout loses definiteness and becomes doubtful ; 

 within it is thickened by a strong porcellanous milky-white varix, on which project 6 to 8 

 tubercle-like teeth, which are slightly elongated from within outwards ; this labral varix is 

 entirely absent at the upper angle of the mouth. Inner lip : its curve cuts somewhat 

 deeply into the body-whorl, which it crosses as a thinnish, expanded, defined glaze ; down 

 the pillar it is reverted, with a slightly detached and projecting edge ; towards the point 

 of the mouth it is suddenly inverted so as to narrow and cover the canal, leaving behind 

 it on the left a small, shallow, angulated furrow, whose labial side is scored with minute, 

 blunt, interrupted lamella? : there are 4 tubercle-like teeth on the pillar, of which the 

 highest is often a little remote from the rest, the lowest, close to the origin of the canal, is 

 smallest : the lip is plaited variously by the underlying spirals ; near the upper corner is 

 a single, rather obsolete tooth, which, like the rest, is a little elongated from within 

 outwards. H. 1*15 in. B. 0"6. Penultimate whorl, height 0-26. Mouth, height 0'39, 

 breadth CC33. Canal, length 0-23, breadth 0-03. 



1 I use this word to recall the similar, though stronger, feature in Ranclla scrobiculator, Linne. 



