355 
Carditella atkinsoni, Tenison-Woods, Tate and May, Proc. 
Linn. Soc., New South Wales, vol. xxvi., 1901, part 3, p. 485, pl. 
xxvii., f. 107. 
Cuna atkinsoni, Tenison-Woods, Hedley and May, Records 
Austr. Mus., vol. vii., No. 2, 1908, p. 118, 100 fathoms off Cape 
Pillar, Tasm. 
Dredged Gulf St. Vincent, under 22 fathoms, many 
whole and valves; 110 fathoms off Beachport, one valve; 130 
fathoms off Cape Jaffa, five good valves. 
Some examples have very fine concentric strize and fewer 
marginal denticulations; others seem very solid, probably 
from senility; and one variety is much narrower and more 
solid, and has a broad solid hinge-plate; but the examples 
were too few to create a new species from them. 
Cuna hamata, Hedley and May. 
Cuna_hamata, Hedley and May. Records Austr. Mus., 
vol. vii., No. 2, 1908, p. 124, pl. xxv., f. 33-86. “ype locality.— 
100 fathoms, off Cape Pillar, asmania. 
Dredged off Beachport in 40 fathoms, one alive, eighty- 
six good valves; 49 fathoms, ten poor valves; 100 fathoms, 
fifteen good valves; 150 fathoms, sixty-five good valves; 
north-west of Cape Borda, 62 fathoms, ten poor valves; off 
Cape Jaffa, 130 fathoms, thirty-nine good valves. It has 
evidently a wide range in depth, though none were taken 
in 200 or 300 fathoms. 
During life it is of a translucent horn colour, opaque 
white when dead. 
Cuna obliquissima, Tate, sp. 
Cardita obliquissima, Tate, Trans. Roy. Soc., S. Austr., vol. 
ix., 1887, p. 70, pl. v., f. 9. Type locality.—22 fathoms, En- 
counter Bay. 
Dredged at different depths in Gulf St. Vincent and 
Backstairs Passage; seven miles south-west of Newland Head 
in 20 fathoms, one alive, of faint pink tint; off Beachport in 
40 fathoms, twelve good valves; in 49 fathoms, seventeen 
poor valves; off Cape Borda in 55 fathoms, one whole and 
twenty-five good valves; in 62 fathoms, four whole and three 
valves, all poor; off Beachport in 110 fathoms, nine valves, in 
moderate condition; in 150 fathoms, two valves, moderate. 
This lives chiefly in water up to 25 fathoms, and is in poor 
state above 60 fathoms, and not found above 150. 
In addition to the stout ‘four or five radial riblets’’ on 
the posterior slope noted by Tate, living shells show fine 
axial riblets over the whole surface, quite to the anterior mar- 
gin. The “distant concentric grooves” do not correspond in 
direction with the fine microscopic accremental striz, but cut 
them obliquely from the front downwards and backwards, 
12 
