236 RECORDS OF THE AUSTRALIAN MUSEUM. 
MItRiITHARA PROLDS sp. nov. 
(Plate xliii., fig. 24.) 
Shell small, rather thin, ovate-fusiform. Colour buff, clouded with 
pale brown on the periphery. Whorls six, including two of the proto- 
conch. Seulpture:—The whole shell is over-run with spiral flat-topped 
cords, which become gradually smaller and closer on approaching the 
anterior end; twenty-five of these occur on the last whorl, of which eight 
ascend the penultimate; the radials are curved delicate riblets, tapering 
upwards, and vanishing before reaching the summit of the whorl; these 
riblets disappear on the last whorl; the penultimate carries about twenty- 
five. Aperture wide; sinus a slight sigmoid flexure, the outer lip thin, 
curved forward; deep within are fifteen short spiral lyre; two small 
plications on the columella; canal short and broad. Length 6 mm., 
breadth 2°7 mm. 
This form was at first28 mistaken for M. ulbw It is, however, much 
nearer to the fossil M. daphnelloides, of which it may be a variety, 
differing by a more pointed protoconch, less prominent plications on the 
columella, and finer, closer riblets. 
Hab. N.S.Wales:—80 fathoms, 22 miles east of Narrabeen (type) ; 
100 fathoms, Port Macquarie (self); 50 fathoms, Cape Three Points 
(“Thetis”). Victoria :—80 fathoms, Gabo Island (‘‘ Hndeayour’’). 
Inquisitor Hedley. 
Inquisitor Hedley, Journ. Roy. Soc. N.S.W., li., 1918, p. M. 79. Type, 
Pleurotomu sterrha Watson; Drillia auetorwm im part (not Drillia 
Gray, Ann. Nat. Hist., i., 1838, p. 28). 
The group here discussed has hitherto been called “ Drillia,” but 
examination shows that name to be inapplicable. By original usage, the 
type being wmbilicuta, Drillia was applied to an African group already 
named Clavatula by Lamarck.22 Having later realised that this African 
group was already provided with a name,?° Gray deflected ‘‘ Drillia” for 
service in another direction. In this resurrected existence Drillia has 
been improperly employed for an Indo-Pacific group. 
Compared with Olavutula the shell of Inquisitor is less massive, but 
more long and slender, with a spire taller in proportion. Radial sculpture 
is usually dominant in Inquisitor, where the grooved fasciole runs rather 
closer to the suture, and where the aperture in aged specimens is some- 
times a little contracted by inflection of the outer lip. There is rarely a 
false umbilicus. The operculum of Inquisitor is lanceolate with the 
nucleus apical, instead of medio-lateral, as in Clavatula. 
28 Hedley—Kec. Austr. Mus., vi., 1907, p. 298. 
29 Maltzan—Jahrb. deut. malak. Gesell., x., 1883, p. 121, pl. iii., fig. 5. Dall— 
Proe. U.S. Nat. Mus., liv., 1918, p. 324. 
30 Gray—Ann. Mag. N. Hist. (2), vii., 1851, p. 337, and Syst. Arrang. Moll. 
Brit. Mus., 1856, p. 8. 
