REPORT ON THE GASTEROPODA. 455 



whole height of the shell. It is slightly contracted above, and is not very open below ; 

 and is altogether rather small for the shell. Outer lip is a little flattened above ; but 

 from this forms a full round sweep. Inner lip slightly concave ; the moderate pad which 

 fills the upper corner of the mouth is divided from the edge of the outer lip by an angular 

 furrow, below which a small tubercular swelling runs out with a slight downward 

 direction ; the pad spreads widely and thinly across the body, and covers the umbilicus so 

 as to leave of it only a mere chink ; below this it narrows, but without any sudden 

 contraction, to the somewhat thickened pillar, where there is a bevelling off to a narrow 

 reverted edge, which is continued round on the base to meet the outer lip. H. 0"57. 

 B. 0'45. Penultimate whorl, height 0'15.- Mouth, height 0*41, breadth - 3. 



This species belongs to the Amauropsis group ; but I know none with which to compare it. It 

 is much higher and narrower than Natica impcrvia, Phil., from Magellan Straits. There is a species 

 of Natica from Station 169, north-east from New Zealand, 700 fathoms, which may perhaps be this 

 species ; but it is in too bad condition for identification. 



30. Natica [Amauropsis) suturalis, Watson (PI. XXVII. fig. 4). 



Natica suturalis, Watson, Prelim. Report, pt. 7, Journ. Linn. Soc. Lond., vol. xv. p. 257. 



Station 149c. January 19, 1874. Lat. 49° 32' S., long. 70° 0' E. Balfour Bay, Royal 

 Sound, Kerguelen's Land. 60 fathoms. Volcanic mud. 



Shell. — Conic-oval, thin, umbilicated, with a coarse brown epidermis, and a channelled 

 suture. Sculpture: Longitudinals — the surface is covered with fine close-set hair-like 

 striae, indicating lines of growth. Spirals — there are a good many faint flexuous lines, and 

 very obsolete but broader furrows. Colour apparently yellowish white, but there is a very 

 persistent, dull ruddyish-brown epidermis, in which there are narrow longitudinal lines of 

 lighter and darker shade. Spire high and scalar, each whorl rising high out of the one 

 below. Apex quite worn away in both specimens. Whorls 4^, tumid, large from the 

 beginning and of slow increase. Suture not very oblique, channelled. Mouth very slightly 

 oblique to the axis, semicircular, but a little slewed, so as to be very slightly pointed 

 above, and unduly bulging below beyond the point of the pillar ; it is two-thirds of the 

 total height of the shell. Outer lip retreats somewhat on leaving the body-whorl, and at 

 this part is slightly contracted, but below this it is open and its curve is very regular ; 

 there is a very faint tendency to angulation on the base ; its edge is narrow and sharp. 

 Inner lip straight till it strikes the base of the shell, where it curves with a full rounded 

 sweep to the right ; it is carried across the body on a thickish, prominent, reverted layer, 

 crosses the umbilicus with a thin reverted edge, which half covers the opening, and is 

 thickened and rounded, with a narrowed edge at the point of the pillar. Umbilicus is a 

 funnel-shaped opening, very much contracted and concealed by the reverted pillar-lip. 

 H. 07. B. 0-63. Penultimate whorl, height 0-22. Mouth, height 0'47, breadth 0*38. 



