359 
the central cartilage pit. The left valve has a posterior di- 
verging cardinal tooth, and a long postero-lateral tooth sep- 
arated from the margin by a groove, which receives the pos- 
tero-lateral marginal lamina of the right valve. The socket 
of this cardinal is completed by a diverging tooth in the 
right valve, lying anterior to it, where it rests on a low ledge, 
and so forms also the posterior wall of the cartilage pit; this 
is completed dorsally by a horizontal projection forwards 
from the right posterior cardinal just beneath the edge of 
the prodissoconch, where there is a horizontal groove in each 
valve. 
Condylocardia compressa, Hedley and May, sp. 
Cuna compressa, Hedley and May. Records of the Aus- 
tralian Museum, vol. vii., No. 2, 1908, p. aan pl. xxiv., f. 29, 
30, 31, 382. Type locality.—100 fathoms, off Cape Pillar, Tas- 
mania. 
Dredged off Beachport in 40 fathoms, three alive and ninety 
valves; in 49 fathoms, one whole and fifty valves; in 110 
fathoms, one whole, twenty-seven valves, several of them 
poor; in 150 fathoms, twenty-five valves, rather poor; in 200 
fathoms, two valves, poor; north-west of Cape Borda in 62 
fathoms, twenty-three valves; and off Cape Jaffa in 130 
fathoms, one valve. In 40 fathoms would appear to be its 
real habitat. 
It comes very close to C. subradiata, Tate, but its greater 
number of less valid ribs and its more transverse shape when 
young distinguish it. 
I suggested to Mr. Hedley that this species is a Condy- 
lecardia and not a Cuna; and he has re-examined the den- 
tition and concurs in its generic transference. It is compara- 
tively a gigantic species for the genus, which contains (with 
the exception of (. suhradiata, Tate) only minute shells. 
Condylocardia ovata, Hedley. 
Condylocardia ovata, Hedley, Proc. Linn. Soc., New South 
Wales, 1905, part 4, vol. xxx., p. 539, pl. xxxi., f. 5, 6; Verco, 
Trans. Roy. Soc., 8. Austr., 1907, vol. xxxi., p. 109. 
Condylocardia trifoliata, Hedley. 
Condylocardia trifoliata, Hedley, Proc. Linn. Soc., 1906, 
vol. xxxi., p. 475; Verco, Trans. Roy. Soc., S. Austr., 1907, vol. 
*xXxX1-, p. LOO: 
Condylocardia pectinata, Tate and May. 
Carditella pectinata, Tate and May, Trans. Roy. Soc., S. 
Austr., 1900, vol. xxiv., p. 108. Type locality.—‘‘Derwent 
Estuary, Tasmania’? (W. L. May); Proc. Linn. Soc., New South 
Wales, 1901, vol. xxvi., part 3, p. 485, pl. xxvii., f. 96, 97. 
Condylocardia pectinata, Tate and May, sp., Hedley, Mem. 
Austr. Mus., 1992. vol. iv., part 5, p. 318, ‘63-75 fathoms, off 
