REPORT ON THE GASTEROPODA. 175 



scored with fine close-set threads up to the sharp-topped swelling continuous with the 

 canal ; the small point beyond this swelling has 3 or 4 coarser irregular threads and 

 furrows. Colour faintly yellow, with traces of a sutural, median, and basal band of brown. 

 Spire stumpy, conical. Apex a short, broad, blunt cone of 3^ whorls, the two last of 

 which are sharply keeled ; the union-line of this embryo to the first regular whorl has a 

 deep round sinus with a blunt brown-stained lip. Whorls 7, slightly convex, conical, beaded 

 round the top ; the last whorl is large compared with the others, is a little elongated, and 

 has a rounded base produced into a snout, which is broadish and somewhat larger than is 

 usual in the genus. Suture impressed. Mouth oval, pointed above, and continued below 

 into the large oblique funnel-mouthed canal. Outer lip thin and sharp in front of the 

 labral varix, straight above, arched and patulous below, with about 12 long little teeth 

 within ; it does not form a flange round the very patulous canal-mouth. Inner lip con- 

 cave, with a broad, thick labial glaze, behind the prominent round edge of which is a 

 minute chink ; on this glaze there is one large long tooth near the upper corner of the 

 mouth, some 2 or 3 small round tubercles on the body, and 4 larger ones on the very 

 short pillar, whose point is flanged, twisted, and very abruptly cut off. H. 0"24 in. B. - 12. 

 Penultimate whorl, 0-05. Mouth, height 0*13, breadth 0-07. 



This dainty little species, with some very obvious superficial differences, closely approaches Nassa 

 pusio, A. Ad. ; but the embryonic apex has half a whorl fewer, and the sculpture and form are 

 really different. In particular, the pillar is not isolated by a strong basal furrow, and the spiral 

 furrows on the base, though strong, have nothing like the depth they have in that species ; nor has 

 the pillar in that the little teeth which are very marked in the Challenger species. Marrat in his 

 monograph on the Varieties in Nassa, p. 97, No. 1337, places it between Nassa splendidula, Dunker, 

 and Nassa trinodosa, E. A. Sm. 



2. Nassa dissimilis, 1 n. sp. (PI. XVII. fig. 6). 



Station 168. July 8, 1874. Lat. 40° 28' S., long. 177° 43' E. Off New Zealand. 

 1100 fathoms. Blue mud. Bottom temperature 37 0, 2. 



Shell. — Thin, very stumpy, with a short broad body whorl, short rounded base, short 

 conical subscalar spire ; a very short, gibbously rounded mouth, and an excessively short 

 pillar. Sculpture ; there are frequent feeble riblets at irregular distances which are dotted 

 with small round tubercles ; the shallow parting furrows are broadish, and are scored with 

 strongish lines of growth. Spirals — the tubercles on the riblets, though unconnected, are 

 yet arranged in rows, of which there are 5 or 6 on the body whorl ; below these, on the 

 base, are 5 feeble distant threads ; the scar of the old canal twines round the pillar and 

 occupies its whole length ; the upper edge of this scar is keeled with a sharp thread, above 



1 So called from its unlikeness to others of the genus. 



