A REVISION OF THE AUSTRALIAN TURRIDA—HEDLEY. 277 
undulations, traverse the upper whorls and vanish on the base; on the 
last whorl these ribs, exclusive of the varix, amount to eight; these are 
over-ridden by alternately larger and smaller dense spiral threads; on the 
last whorl, where the intermediates are sometimes double, the major 
threads amount to twenty-five; all these threads carry very minute sharp 
and close grains. Aperture:—Varix very heavy and prominent; sinus 
broad, and expanding outwardly; canal short and open; inner lip with 
ten entering ridges, which continue in the throat; columella lip with nine 
elongate tubercles. Length 15 mm., breadth 55 mm. 
‘This is like Plewrotomu crassilabrum Reeve, but is larger, and the ribs 
are more widely spaced. 
Hab. Queensland :—20 fathoms, Darnley Island (type, Brazier). 
- HPREMA CURTISIANA sp. nov. 
(Plate xlvii., fig. 76.) 
Shell narrowly lanceolate, angled on the spire whorls. Colour uniform 
ochraceous-buff. Whorls nine, including a protoconch of two smooth and 
one keeled whorl. Sculpture:—The original keel gradually breaks up 
into radials, which on the fifth whorl appear as prominent, broad, tuber- 
cular ribs, set at about nine to the whorl, perpendicular and discontinuons ; 
these decrease in relative size, but increase in number till they amount to 
twelve on the last whorl, sometimes splitting into riblets on the base; 
fine spiral threads, amounting to eleven on the penultimate and to about 
thirty-three on the final whorl, are spaced on the periphery and crowded 
towards the base and fasciole area. Aperture :—The varix is prominent and 
expanded, toothed at the oral margin by the spiral sculpture; columella 
margin armed by four transverse plications; both sinus and canal are 
short and expanded, Length 9:5 mm., breadth 4 mm. 
This is related to H. spwrea Hinds, differing from that by smoother 
contour, more delicate sculpture, more numerous evanescent ribs, and 
more numerous and finer spirals. 
Hab. (Queensland :—7 fathoms, Port Curtis (type, Brazier). 
HPREMA DENSEPLICATA Dunker. 
Drillia denseplicata Dunker, Mal. Blatt., xviii., 1871, p. 159. 
Pleurotoma denseplicata Weinkautt, Conch. Cab., iv., Abth. 3, 1876, p. 107, 
pl. xxiii., figs. 7, 9. 
Cluthwrella denseplicata Hedley, Proc. Linn. Soc. N.S.W., xxvii., 1902, p. 17. 
Id. Pritchard and Gatliff, Proc. Roy. Soc. Vict., xviii., 1906, p. 50. 
Cluthurella philomena Tenison- Woods, Proc. Roy. Soc. Tasm., 1875 (1876), 
p. 141. Id. Tate and May, Proc. Linn. Soe. N.S.W., xxvi., 1901, 
p. 371. Jd. Pritchard and Gatliff, Proce. Roy. Soc. Vict., xii., 1900, 
p- 177. Id. Verco, Trans. Roy. Soc. §.A., xxxiii., 1909, p. 307. 
