MOLLTJSCA or THE * CHALLENGER ' EXPEDITION. 369 



6. Nassa capillaris, n. sp. 



St. 113 A. Sept. 1, 1873. Lat. 3° 47' S., long. 32° 24' 30" W. 

 Anchorage at Fernando Noronha. 25 fms. 



Shell. — Eather small, thick, porcellaneous, stumpy, with rounded 

 whorls, a conical subscalar spire, a short conical apex, a 

 rounded, truncate, oblique base, and a short, very oblique snout 

 defined by a strong furrow. Sculpture. Longitudinals — there 

 are about 12 coarse rounded ribs and furrows ; the last rib forms 

 a strong varix behind the lip ; these ribs are very feeble in the 

 suture, and die out on the base ; there are hair-like, sharp, close- 

 set lines of growth. Spirals — on the penultimate whorl there 

 are about 6 strongish. rounded threads, above these and below the 

 suture are two or three finer and weaker ; those on the base are 

 rather stronger than the others ; the base of the pillar is defined 

 by a strong furrow, with a sharp thread in front of it ; the pillar 

 is somewhat weakly scored by coarse flat spirals. Colour some- 

 what glossy white, with more or less of a rich chestnut band in 

 the middle of the whorls, which colour is strongest in the inter- 

 stices of the ribs. Sjnre rather high, conical, subscalar. Apea; 

 small, consisting of three turbinate rounded whorls. WJiorls 10, 

 short, subcylindrical, constricted at the top ; the last is hunchy, 

 very short, round, with a very oblique contracted base. Suttcre 

 a little impressed, and slightly marginated in consequence of the 

 comparative feebleness of the ribs immediately below. Mouth 

 round, open, very bluntly pointed above, and produced below into 

 the oblique, narrow, funnel-mouthed canal. Outer lip thickened 

 outside and in by a white varix, of which the one inside is scored by 

 10 or 12 long, close-set, sharpish teeth ; it is arched throughout, is 

 very slightly retreating, and very patulous on the forward-arching 

 base. Inner lip semicircular, with a thick white pad of glaze, which 

 has a sharp, prominent and defined edge with a slight chink behind 

 it; there is a strong blunt tooth above, several irregular and inde- 

 finite tubercles on the body, and four or five round and biggish 

 tubercles on the very short pillar, whose twisted patulous and 

 abruptly cut-ofl" point is not flanged. H. 05. B. 0-25. Penul- 

 timate whorl, height O'l. Mouth, height 0-21, breadth 0-17. 



Mr. Marrat thinks I have mixed up two species here, he regards 

 the largest specimen as N. proxima, C. B. Ad. {= N. versicolor, 

 C. B. Ad., fide Carp.), a Panama species, and holds the rest as 

 JV. incrassata, Miiller, a North-Atlantic and British species. Dr, 

 Grwyn Jeffreys agrees with me in considering all the specimens 



