S68 EET. B. B00& WATSON ON THE 



irregularly continuous from whorl to whorl, and die out at the 

 extreme point of the base ; the last forms a large white varix a 

 little remote from the lip-edge. Spirals — there is a continuous 

 thread of largish tubercles close below the suture, with a strongish 

 furrow on its underside ; the interstices of the ribs are scored by 

 narrow furrows and flat threads, which latter on the base rise 

 into small tubercles in crossing the ribs : there is no special fur- 

 row round the base of the pillar, which is scored with fine close- 

 set threads up to the sharp-topped swelling which is 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. S^ire stumpy, 

 conical, A^ex a short, broad, blunt cone of 3| whorls, the two 

 last of which are sharply keeled ; the uniourline 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 concave, 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. B. 0-12. Penultimate whorl, 0-05. 

 Mouth, height 0-13, breadth 0-07. 



This dainty little species, with some very obvious superficial 

 differences, closely approaches N.pusio, A. Ad.; but the embryonic 

 whorl 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 JS. splen- 

 didula, Dunker, and i\^. tiHnodosa, E. Sm. 



