292 RECORDS OF THE AUSTRALIAN MUSEUM. 
subcontinuous radial ribs; these are crossed by cords which project on 
the summits of the ribs, and which amount to nine on the last wharl and 
four on the penultimate. Aperture trigonal, with a short open canal and 
a wide effuse sinus; the varix projects a free limb towards the mouth; 
on the columella are three transverse plaits, which lengthen in ascending 
order. Length 4:3 mm., breadth 2 mm, 
This is nearly related to L. brachyspira Hervier. From lifuan 
specimens of that form it differs by more slender contour, more contraction 
at the sutures, the ribs are more prominent, and the spirals more distinctly 
bridge the inter-radial hollows. For it is suggested the subgeneric group 
of Acrista. 
Hab. Queensland :—5 to 8 fathoms, Murray Island (type, self). 
LIBNARDIA RALLA sp. nov. 
(Plate xlix., fig. 100.) 
Shell small, solid, ovate-lanceolate, base constricted, snout recurved, 
spire turreted, and apex mucronate. Whorls eight, of which three and a 
half compose the protoconch. Colour pale buff, with a pale orange zone 
on the base. Sculpture:—Ribs set at about ten to a whorl, prominent, 
perpendicular, slightly interrupted from whorl to whorl at the suture, 
comparatively bolder on the upper whorls, and vanishing on the base; 
the spirals ave close set cords crossing both ribs and their interstices, 
nodulous on the snout—on the Jast whorl twelve, and on the penultimate 
four. Aperture:—Mouth narrow, vertical; varix not prominent, edge of 
lip with six small interior denticules; sinus subtubular; columella with a 
slight deeply-seated fold. Length 5 mm., breadth 3 mm. 
Hab. Queensland :—5 to 8 fathoms, Murray Island (type, self). 
LIBNARDIA RHODACMRE Melvill and Standen. 
Mangilia (Glyphostoma) rhodueme Melvill and Standen, Journ. of Conch., 
viii., 1896, p. 288, pl. ix., fig. 29, and 1897, p. 401. 
Glyphostoma rhodacme Bouge and Dautzenberg, Journ. de Conch., 1xi., 
' 1913 (1914), p. 186. 
Hab. Queensland :—Two Isles, off Cape Flattery (self): 
LIBNARDIA ROSELLA sp. nov. 
(Plate xlix., fig. 101.) 
Shell small, solid, ovate-pointed. Colour rose-pink, with a chestnut- 
brown band below the suture, an indistinct pale zone on the periphery, 
and a faint brown line on the base. Whorls seven, including the proto- 
conch; the second whorl of the latter is not keeled, and is more produced 
than in DL. rwbida. Seculpture:—The radial ribs are broad, rather pro- 
minent, and undulating; they commence below the fasciole and cease on 
