186 THE VOYAGE OF H.M.S. CHALLENGER. 



I do not know with what to compare this curiously shaped species, in which the whorls, tubercled 

 round the top, rise one above the other in terraces or small towers. There is a fossil species, Nassa 

 turbinelloides, described and figured by Professor Seguenza in his great work " Le formazioni terziarie 

 nella Provincia di Reggio," p. 2G1, pi. xvi. fig. 23, which seems to resemble it more than anything 

 I know ; but that species is markedly different in its longer and less truncated base. Mr Marrat, 

 in his " Varieties of Nassa," p. 59, No. 992, puts the Challenger species between Nassa plebecula, 

 Gould, and Nassa luteola, E. A. Sm. 



21. Nassa (Ilima) paupera, Gould. 



Nassa paupera, Gould, Proc. Bost. Nat. Hist. Soc, 1850, vol. iii. p. 155. 



„ Gould, Otia, p. 70. 



„ Gould, U.S. Expl. Exped., p.262, pi. xix. fig. 330. 



unifasciata, Pease, MS. 



paupera, Carpenter, Synonymy of Mr Pease's Shells, Proc. Zool. Soc. Lond., 1865, p. 516. 

 (Ilima) unifasciata, Brazier, Proc. Linn. Soc. New South Wales, vol. i. p. 181. 



,, paupera, Tryon, Manual, vol. iv. p. 47, pi. xv. figs. 246-250. 



April 17, 1874. Port Jackson, Sydney. 



Station 163b. June 3, 1874. Lat, 33° 51' 15" S., long. 151° 22' 15" E. Off Port 

 Jackson. 35 fathoms. Hard ground. Bottom temperature 63°. 



Habitat: — North and North-East Australia and New Guinea, 5 to 30 fathoms 

 (Brazier), Pacific Islands (Gould). 



In the Proc. Zool. Soc. Lond., 1863, p. 313, Dr P. Carpenter has some valuable remarks on 

 the whole group of species to which this of Gould belongs. 



22. Nassa (Hima) capittaris, Watson (PI. XI. fig. 7). 



Nassa (Hima) capillaris, "Watson, Prelim. Report, pt. 13, Journ. Linn. Soc. Lond., vol. xvi. p. 369. 



Station 113a. September 1, 1873. Lat. 3° 47' S., long. 32° 24' 30" W. Anchorage 

 at Fernando-Noronha. 25 fathoms. Volcanic sand and gravel. 



& 



Shell. — Rather small, thick, porcellanous, stumpy, with rounded whorls, a conical 

 subscalar spire, a short conical apex, a rounded, truncate, oblique base, and a short, very 

 oblique snout denned by a strong furrow. Sculpture: Longitudinals — there are about 

 1 2 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, 1 

 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 somewhat glossy white, with more or less 

 of a rich chestnut band in the middle of the whorls, which colour is strongest in the 



1 Hence the name. ' 



