REPORT OX THE GASTEROPOD i. 355 



by a faint angulation, below which they are slightly tumid, without any contraction into 

 the inferior suture ; the last, which is rather small, has a conical base produced into a 

 broadish, triangular, one-sided snout. Suture slight, inasmuch as the inferior whorl laps 

 up on the one above ; but there is an appreciable constriction. Mouth oblong, pointed 

 above ; there is no canal below except the channel behind the pillar. Outer Up very thin ; 

 its curve is somewhat flattened ; its edge forms a very regular sweep with a rather high 

 shoulder above, between which and the body lies the deepish, but broad, open-mouthed 

 sinus. Inner lip very thin and narrow, dying out early on the scarcely oblique or twisted 

 edge of the longish, straight, and conical pillar, the point of which comes short of the lip- 

 edge, and whose junction with the body is concave. H. - 21 in. B. O'l. Penult imate 

 whorl, height 0-04. Mouth, height O'l, breadth 0'05. 



This species somewhat resembles Clathurdla pachia, Wats., but is in all its proportions very 

 much smaller ; the whorls, especially the last, are very much less tumid, the spire is distinctly scalar, 

 and the sculpture is very markedly different. Than Daphnclla attenuata, B. A. Sm., besides the 

 different apex, the whole shell is smaller, more attenuated, and more delicate. 



9. Clathurella araneosa (Watson), (PI. XIX. fig. 1). 



Pleurotoma (Defrancia) araneosa, Watson, Prelim. Report, pt. 10, Journ. Linn. Soc. Lond., voL xv. 



p. 462. 



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

 Culebra Island, West Indies. 390 fathoms. Pteropod ooze. 



Shell. — Small, yellowish, minutely ribbed and faintly spiralled, with a small, broadish, 

 scalar, sharp-pointed spire, a slightly swollen body-whorl and rounded base, produced into a 

 square, prominent, one-sided snout. Sculpture : Longitudinals — there are exceedingly fine, 

 faint, microscopic threads in the line of growth ; at distances of about x^ of an inch 

 apart these rise into small, sharpish, round-topped riblets, which run continuously from the 

 suture to the snout, though on the base and below it they become feebler ; on the earlier 

 whorls these are, of course, less marked and more close set : in the intervals of the larger 

 riblets one or two fainter ones occasionally appear. Spirals — below the slightly concave 

 sinus-area is an obtuse angulation, accentuated by the slight prominence of the two small 

 spiral threads which lie there ; below this there are on the body-whorl above the lip-corner 

 about 5 other small spirals not so prominent ; on the lower part of the body and on the 

 base they are weaker, but become stronger again towards the point of the base and on the 

 snout ; the intersection of these with the spirals produces a slight spider-web like appear- 

 ance. 1 Colour yellowish, without gloss ; the apex is buff. Spire rather short and broad, 

 scalar, and conical. Apex consists of 4J very small, conical, scalar, convex, buff whorls, 

 parted by a deep suture ; the first whorl and a half is closely spirally striated with about 



1 From this the name is derived. 



