334 



Eunaticina albosutura, n. sp. PI. xx., tigs. 10 and 11. 



Shell flatly globosely obliquely oval, of 4 whorls-, includ- 

 ing a protoconch of 2 smooth, flat whorls, ending abruptly. 

 Spire- whorls rapidly increasing ; spire flatly round, apex 

 scarcely exsert. Suture linear, slightly descending at the 

 aperture. Aperture obliquely semi-circular. Outer lip 

 curved, less behind than in front, thin, simple, scarcely re- 

 tiring at the suture. Inner lip distinct, short, opaque-white, 

 thick, with a marked triangular callus joining it to the outer 

 lip, just within the margin of which is a shallow gutter run- 

 ning to the suture. Columella long, straight, slightly re- 

 flected over the umbilicus behind, narrower in front, curv- 

 ing into the basal lip at rather more than a right angle. Um- 

 bilicus very open to the apex, with a central broad, low spiral 

 funicle running into the middle of the columella. Sublen- 

 ticular, minutely wavy, axial and spiral scratch-lines. Colour 

 light-yellowish-brown, with a central white spiral, and a 

 gradually widening infrasutural white band, corresponding 

 with the labial callus. Operculum horny, paucispiral, nucleus 

 towards the inner front part. In life there is a thin epider- 

 mis; the animal can completely retract within the shell. 



Dint. — Length, 18 mm.; width, 12"5 mm.; height, 9 

 mm. 



Locality . — TyjDC from 25 fathoms Thorny Passage ; in 

 15 to 20 fathoms Investigator Strait, 2 recent ; in Gulf St. 

 Vincent, depth unrecorded, several alive and dead. 



Diagnosis . — The species is closely allied to Natica umhili- 

 cata, Quoy and Gaimard, or Naticina pic fa, Reeve : but is 

 somewhat heavier, with a rather less prominent spire, and 

 with a much thicker callus in the back of the aperture. When 

 lying on its base with the anterior part of the aperture to- 

 wards the observer, the shell has a greater vertical slope to- 

 wards the right, and does not look so round ; and when the 

 base is upwards and the apex away from the observer, the 

 umbilicus is more largely visible. 



Vanikoro denselaminata, n. sp. PL xxix., ligs. 1, 2, and 3. 

 Shell small, delicate, dull-white, globosely ovdl of 31 

 whorls. Protoconch one whorl and a half, apex exserted, 

 with three bold spiral ribs, ending abruptly. Sutures deep. 

 Spire-whorls convex, rapidly increasing ; with erect axial 

 lamellae, close set and becoming progressively more crowded. 

 No spirals. Umbilicus large, perspective, with crowded ob- 

 lique axial striae, and a bold, twisted carina winding down 

 its whorls, and outside this a furrow which gets wider and 

 shallower on the base of the shell. Apertui-e oval, truncated 



