328 
Mr. Hedley, who has seen my series, regards his type as 
a micromorph of C. kingensis, and withdraws his species. 
It is very variable. It may be 16 mm. long, as in the 
type of (’. cognata, 11 mm. as in J/. emina, or 5'75 mm. as 
in some adult examples of mine. In shape it may be long 
and narrow, or short and broad. In sculpture it may have 
axial ribs, well marked, narrow, almost lamelliform, or round 
and solid, or low, or quite obsolete, especially on the body- 
whorl. The spiral liras may be quite valid, or revealed only 
by a fairly high power of the microscope; generally the 
st marked when the axials are small. The colour 
spirals are be 
may be a uniform brown tint, or there may be spiral colour 
bands of different widths, or the shell may be white. 
Dredged in 15-20 fathoms off St. Francis Island, 1 nearly 
adult: in 40 fathoms off Beachport, 11 good; 55 fathoms 
north-west of Cape Borda, 1 good, 2 poor; in 90 fathoms off 
Cape Jafia, 2 immature ; in 104 fathoms 35 miles off the Nep- 
tunes, 19 good, 35 immature; in 110 fathoms off Beachport, 
2 good, 3 moderate; in 130 fathoms off Cape Jaffa, 5 per- 
fect. 5 immature; in 150 fathoms off Beachport, 3 moderate ; 
in 200 fathoms, 6 good, 4 poor; in 300 fathoms off Cape 
Jaffa, 4 immature. It appears not to inhabit our shallower 
waters, but to be fairly evenly distributed, though rare from 
40 to 300 fathoms. 
Borsonia ceroplasta, Watson. Vee) Le 
Borsonia ceroplasta, Watson, Chall. Reps. Zool., 1886, vol. 
xvy., p. 368, pl. xviii., fig. 2, “North of Culebra Island, West 
Indies, 390 fathoms, Pteropod ooz.”’ , 
Dredged in 300 fathoms off Cape Jaffa, 1 dead shell. It 
differs from the type in that its spire is proportionally not 
quite so long, and no obsolete flat spirals are visible above 
the suture and winding round the base. The nucleus, suture, 
infrasutural pad, angulation, tubercles, generic fold on the 
columella, canal, labral sinus (as well as can be determined 
from the description and figure) are identical. As only one 
specimen has been taken, and this immature, of six whorls 
only instead of eight, and a dead though well-preserved ex- 
ample, and as the members of the Pleurotomide show very 
wide specific variations, it is probably only a variant, and is 
provisionally so recorded. This is a new genus for South 
Australia. 
Mitromorpha alba, Petterd. 
Columbella alba, Petterd, Jour. Conch., yol. ii., 1879, p- 
104. Fype locality—“Blackman’s Bay, Tasmania.” 
Mitromorpha alba, Petterd, Tate, Proc. Roy. Soc., New South 
Wales, 1898, p. 397; Tate and May, Proc. Linn. Soc., New South 
