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



The generic place of this and the three following species is very doubtful ; but the mouth is 

 rather too wide to justify their being classed with the Pyrene group of Columbella, which the general 

 aspect of the shell suggests as their place. 



19. Fusus (Neptunea) regulus, Watson (PI. XII. fig. 7). 



Fusus (Sipho) regulus, Watson, Prelim. Report, pt. 14, Journ. Linn. Soc. Lond., vol. xvi. p. 378. 



Station 149d. January 20, 1874. Lat. 49° 28' S., long. 70° 13' E. Royal Sound, 

 Kerguelen. 28 fathoms. Volcanic mud. 



Shell. — Small, thin, porcellanous white, with fine riblets and delicate spirals, a rather 

 high, subscalar spire, a large blunt mamillary apex, deep suture, small body, a short 

 rounded contracted base, and a small, lop-sided, emarginate snout. Sculpture: Longitu- 

 dinals — there are on the last whorl about 25 narrow, sharply raised, flexuous, little ribs, 

 parted by flat furrows of twice their breadth ; these decrease in number up the spire ; 

 they die out toward the point of the base ; they bend quickly to the right below the suture, 

 advancing to the left lower down : the furrows and snout are scored with fine lines of 

 growth. Spirals — there are feeble, rounded, sparsely-set threads, of which about eight on 

 the penultimate whorl ; immediately below the suture they are very faint, but are present. 

 Colour yellowish porcellanous white. Spire high, rather cylindrically conical. Apex 

 blunt, mamillary, with an exceedingly small impressed tip ; it consists of two globose, 

 smooth, embryonic whorls. Whorls 5^ to 6 in all, with a rounded shoulder defined by a 

 very slight angulation, below which the whorls are subcyliudrical ; the last is scarcely 

 tumid, with a rounded contracted base prolonged into a stumpy, slightly reverted, emar- 

 ginate snout. Suture sharp, impressed, rather deep, horizontal. Mouth oval, slightly 

 angulated above, and produced below into a short, broad, open, and somewhat oblique 

 canal. Outer lip thin, a little expanded, arched, advancing below, contracted at the 

 canal ; there is at the top a faint approach to a sinus. Inner lip concave above, straight 

 on the pillar, which is in front little oblique, but has a slight twist ; a thin narrow glaze 

 defines it throughout. H. - 28 in. B. 0-13. Penultimate whorl, height - 08. Mouth, 

 height 0-14, breadth 0"09. 



This species has some faint resemblance to Columbella {Pyrene) costidata, Cantr., but is less 

 compact, has a more impressed suture and more rounded whorls, wants the densely set minute 

 spirals, and has a longer snout ; the apes, too, diners from that species, in which the tip rises in a 

 minute point, while here it is impressed. 



20. Fusus (Neptunea) eduurdiensis, Watson (PI. XII. fig. 6). 



Fusus (Siplto) edwardiensis, "Watson, Prelim. Report, pt. 14, Journ. Linn. Soc. Lond., vol. xvi. p. 379. 



Station 145. December 27, 1873. Lat. 46° 43' S., long. 38° 4' 30' E. Between 

 Marion Island and Prince Edward Island. 140 fathoms. Volcanic sand. 



