308 RECORDS OF THE AUSTRALIAN MUSEUM. 
Borda; 40 to 150 fathoms, Beachport; 24 fathoms, Newland Head; 15 to 
20 fathoms, St. Francis Island; Wallaroo and Port Adelaide (Verco). 
N.S.Wales :—Middle Harbour, Port Jackson (self). 
PSHUDORHAPHITOMA AXICULA sp. nor. 
(Plate li., fig. 131.) 
Mungelia hevugonalis Brazier, Proc. Linn. Soc. N.S.W., i., 1876, p. 162 
(not Plewrotoma hexagonalis Reeve, Couch. Icon., i., 1845, pl. xxxii., 
fig. 293). 
Shell solid, subcylindrical, base rounded, sides flat, and summit 
delicately tapered. Colour pale buff, uniform but for a tinge of lilac on 
the columella. Whorls, including the protoconch, nine. Protoconch with 
the initial whorl tilted, the first and second smooth and helicoid. Suture 
linear. Sculpture:—A clathrate sculpture is developed on the third 
whorl, the next is bicarinate; later the keels diminish and vanish; the 
ribs are six to a whorl, elevated, stout, and distant, descending the spire 
perpendicularly and continuously ; at the anterior extremity the ribs ron 
across the snout; the spirals are even closely-packed threads, numbering 
about seventeen on the penultimate, and about forty on the last whorl. 
Aperture:—Mouth very narrow, without denticules on either side; the 
varix is of the calibre of the preceding ribs; its insertion does not rise 
above the plane of the suture, and it fills the interval between two ribs of 
the preceding whorl; sinus small and shallow ; columella perpendicular ; 
canal short and broad. Length 8 mm., breadth 2 mm. 
From its associates in the genus this species differs as follows :—From 
P. alticostata, which is nearest, by less elevated ribs and coarser spirals 
and narrower form; from P. pyramis Hinds, by narrower form; from 
P. agna Melvill and Standen, by larger size, straighter ribs, more slender 
form, and coarser spirals; and from P. multigranosa Schepman, by more 
even sculpture, smaller size, and narrower form. 
Hab. Queensland :—8 to 12 fathoms, Torres Strait (type, Brazier) ; 
4 to 14 fathoms, Albany Passage (self). 
PSBUDORHAPHITOMA BIPYRAMIDATA sp. 10U. 
(Plate li., fig. 132.) 
Shell small, rather solid, lanceolate. Colour uniform white. Whorls 
eight, including the protoconch. The latter has two and a half whorls, the 
first two being smooth and helicoid; the next half whorl carries about ten 
sharp, narrow, arcuate, radiate riblets, quite discordant with the succeeding 
sculpture. The adult whorl begins abruptly with seven prominent ribs, 
which descend the whorls vertically and continuously ; these are traversed 
by spaced spiral cords which commence with two on the third whorl and 
end with seventeen on the last. Between these cords run from two to six 
rows of densely packed microscopic grains. Aperture sublinear; the thick 
and outstanding varix extends a broad lip over the mouth; sinus semi- 
circular, cut out of the varix, with a substantial tubercle on the right 
