256 RECORDS OF THE AUSTRALIAN MUSEUM. 
Shell small, subeylindrical, solid, and very glossy. Colour ice-white. 
Whorls seven, inclusive of the protoconch—a small smooth dome of two 
whorls. Sculpture :—The only spirals are four lines on the snout; ribs 
broad and low, crowded above, and becoming more spaced as growth 
proceeds ; evanescent on the last half whorl, discontinuous from whorl to 
whorl, amounting to eight on the penultimate, sometimes lightly impressed 
and sometimes interrupted by the fasciole, which is not otherwise apparent. 
Suture sinuate. Aperture fusiform; outer lip expanded and bent inwards, 
thickened on its outer edge, insinuate at the base; sinus deeper than the 
canal, with a slightly raised rim, the entrance contracted; on the inner 
lip is a callus sheet, thickening at the posterior angle to a tubercle ; canal 
a mere notch. Length 1] mm., breadth 2°5 mm. 
This species has a general resemblance to Plewrotoma persicu Smith, 
but that differs by larger size, furrows on the base, and a constricted 
fasciole. 
Hub. Queensland :—10 fathoms, Cape Sidmouth (type, A. U. Henn) ; 
4 to 14 fathoms, Albany Passage (self); 20 fathoms, Darnley Island 
(Brazier). 
CLAYUS COSTATUS sp. nov. 
(Plate xlv., figs. 48, 49.) 
Shell small, ovate-elongate, solid and compact. Colour dull white, 
the summit buff-yellow, base anterior to the insertion of the lip pale 
orange-yellow; along the suture are irregular chocolate splashes. Whorls 
seven, including a protoconch of two depressed whorls. Sculpture :— 
There are eight thick and prominent ribs to a whorl; these descend the 
shell vertically and continuously; on the base they are slightly flexed, 
and each terminates anteriorly in a bead; both ribs and interstices are 
engraved by very minute and dense spiral striz; the snout is traversed 
by a few coarse spirals, which cease at the bead row; on the smooth 
glossy protoconch is a pronounced median keel, which ends abruptly at 
the topmost rib. Aperture pyriform, produced into a short, wide, open 
canal; behind the lip is a prominent varix which, rising above the suture, 
fills an intervariceal space on the preceding whorl; a substantial callus 
sheet spreads on the inner lip, and a tubercle is formed near the right 
insertion ; just in front of the canal is a slight insinuation of the outer 
lip. Length of specimen drawn 6 mm., breadth 3 mm.; another specimen, 
length 9 mm., breadth 3-5 mm. 
Hab. Queensland :—12 fathoms, Darnley Island (Brazier). 
Chavous cyeneus Melvill and Standen. 
Drillia witens Brazier, Proc. Linn. Soc. N.S.W., i., 1876, p. 154 (not 
Clavatula nitens Hinds, Zool. Sulphur, i., 1844, p. 20, pl. vi., fig. 17). 
Drillia cygquea Melyill and Standen, Journ. of Conch., viii., 1897, p. 379, 
pl. xi., fig. 82. Id. Bouge and Dautzenberg, Journ. de Conch., 1x1., 
1914, p. 137. 
Hab. Queensland :—25 to 30 fathoms, Darnley Island; 11 fathoms, 
Palm Island (Brazier); 5 to 10 fathoms, Hope Island (self). 
