KEPOKT ON THE GASTEROPODA. 297 



they are feeble. Colour pale buff, but probably white in the living shell. Spire conical, 

 not much contracted ; the first regular whorl is exceptionally tall, narrow, and cylindrical. 

 Apex is a coarse swollen small bulb of little more than one smooth whorl, which lies very 

 much on one side, with the extreme tip almost bent in under it. Whorls. 6, high, of 

 slow increase, the last a very little tumid ; in the sinus-area they scarcely expand, but are 

 convex below this point ; the base contracts rapidly, and runs out into a longish narrow 

 snout. Suture well marked and a little constricted. Mouth club-shaped. Outer lip, 

 convex and in front direct ; it retreats very slightly in its course from where it leaves the 

 body, forming a very small, shallow, . and open rounded sinus. Inner lip is slightly 

 hollowed on the body ; straight on the upper part of the pillar but early cut off, it 

 advances with a long-drawn obliquity to the point of the shell. H. 0'32 in. B. - 12. 

 Penultimate whorl, height 0-06.' Mouth, height 0*15, breadth 0-05. 



I doubt whether the only specimen of this species is full-grown, and the mouth is a little 

 chipped ; but the lines of growth indicate plainly enough the form of the lip. It may be classed 

 with the Plcurotoma nivalis group, but it has a decidedly longer snout than the Typhlomangelias. 



25. Pleurotoma (Surcula) gypsata, Watson (PI. XXV. fig. 1). 



Pleurotoma (Drillia) gypsata, "Watson, Prelim. Report, pt. 9, Journ. Linn. Soc. Lond., vol. xv. p. 413. 



Station 169. July 10, 1874. Lat. 37° 34' S., long. 179° 22' E. North-east from 

 New Zealand. 700 fathoms. Blue mud. Bottom temperature 40°. 



Shell. — Strong, fusiform, biconical, scalar, shortly, sharply, and oblicmely ribbed, keeled, 

 constricted at the suture, with a long and rather inflated body-whorl and a largish snout. 

 Sculpture : Longitudinals — on each whorl is a strongish angulation, forming a shoulder, 

 crowned by a series of. narrow elongated tubercles or short ribs ; this coronated keel lies 

 on the earlier whorls below, but on the later above the middle. The ribs do not reach 

 the lower suture ; in shape and breadth they are irregular, but are always somewhat 

 swollen in the middle and pinched up into prominence ; they are parted by flat open 

 furrows of nearly double their width ; on the body-whorl they extend very little below 

 the shoulder, and still less above it. There are about twenty of these ribs on the last 

 whorl, and fifteen on each of the earlier whorls. The surface is scored with hair-like lines 

 of growth, of which every here and there, and especially on the base in the continuation 

 of the riblets, one is stronger than the rest. Spirals — the carination at the shoulder is 

 made more prominent by the sharp line of tubercles. The whole surface is covered with 

 flatly rounded threads, which are roughened by the incremental lines ; these threads are 

 strongest on the snout, feeble on the body, and very faint in the sinus-area. Colour 

 whitish under a yellowish epidermis, which is a rough but thin and persistent membrane. 

 Spire high, scalar, conical. Apex eroded, but evidently small. Whorls 10 (?), of rather 



(zool. chall. Exr. — part xlii. — 1885.) Tt 38 



