MOLLUSCA HEDLEY AND MAY. 115 



widely umbilicate. A single specimen of G. galbina was taken 

 by the " Thetis " in 63-75 fathoms off Port Kembla, New South 

 Wales, but was catalogued 1 as G. lasmanica, Petterd, 



Calliostoma columnarium, sp,nov, 



(Plate xxii., fig. 3). 



Shell rather solid, imperforate, turbinate, angled at the peri- 

 phery. Colour buff. Whorls five and a half, including a proto- 

 conch of a whorl and a half, which is tilted, malleated, and 

 concluded by a small varix. Sculpture. : three spiral keels appear 

 on the second whorl; as growth proceeds these increase in number 

 but decrease in strength, till at last behind the aperture they are 

 represented by twenty engraved spiral lines extending from the 

 suture to the centre of the base. These are decussated by faint 

 oblique growth lines. Aperture oblique, rhomboidal, outer lip 

 simple, columella thickened, insertions joined by a thin callus. 

 Height, 7'5; rnaj. diam., 8 ; min. diam., 7 mm. A larger 

 broken specimen is 10 mm. in major diameter. 



Four imperfect shells were taken. In general appearance this 

 resembles C. legrandi, Tenison Woods, but differs by blunter 

 keel and the distant engraved spirals. 



Calliostoma retiarium, sp.nov. 

 (Plate xxii., fig. 1). 



Shell small, subperforate, conical, with sharply keeled peri- 

 phery, overlapping spire whorls and a flat base. Colour and 

 number of whorls uncertain, the latter exceeding six. Sculpture: 

 small spiral threads parted by wider interstices amount to seven 

 on the penultimate, and to twenty on the last whorl, of these a 

 double row compose the peripheral keel. On either side of the 

 keel the interstices are wider than usual. The radials are 

 irregular oblique wave-like folds, twenty-two on the last whorl, 

 which raise beads on the keel rows, and there cease abruptly. 

 On the base incipient radials bead the inner spirals. Aperture 

 oblique, trapezoidal, outer lip simple, sharply angled by the 

 periphery, columella insertion a little reflected over the minute 

 umbilicus. Length, 7 ; maj. diam., 6 ; min. diam., 5 mm. 



A single worn specimen represents this species, whose sculp- 

 ture and contour are not approached by any other Australian 

 Calliostoma. 



1 Hedley— Auatr. Mus. Mem., i\\, 1903, p. 334. 



