358 
Vincent, very many; in 40, 45, 49, 55, 62, 110, and 130 
fathoms, from Beachport to the Neptune Islands, but mostly 
in poor condition. 
Diagnosis.—From CU. concentrica, Hedley, by its curved © 
lateral and non-denticulated ventral borders; from C. 
edentata, by its larger size and curved lateral borders; from 
C. atkinsoni, by the character of the hinge and the non- 
denticulated border. 
Type in Dr. Verco’s collection. 
Condylocardia subradiata, Tate, sp. Pl. xvii., f. 25 to 28. 
Carditella subradiata, Tate, Trans. Roy. Soc., S. Austr., vol. 
xi., 1888, pl. xi., f. 7. Type locality.—Shell sand, Royston Head. 
Dredged off Royston Head, 20 fathoms, one alive, large; 
Backstairs Passage, 22 fathoms, one alive and six valves; off 
Beachport in 40 fathoms, fourteen valves; in 49 fathoms, very 
many valves, good; in 110 fathoms, nine whole and very many 
valves; in 90 fathoms off Cape Jaffa, many valves; 
east of North Neptune Island in 45 fathoms, one 
whole, three valves, all poor; north-west of Cape Borda in 
62 fathoms, five alive and many valves, good; thirty-five miles 
south-west of Neptune Islands in 104 fathoms, four valves, 
poor. It seems to live in water from 20 to 100 fathoms. 
Its generic location has been changed. Tate did not 
allude to its dentition in his description, and only the ex- 
ternal surface was figured. His type, which is the only ex- 
ample in his collection, was fixed on a card to show the outer 
surface, and was regarded by him as a left Carditella valve, 
produced posteriorly ; but it proves to be a right Condylocardia 
valve, produced anteriorly. It has a distinct prodissoconch 
scale, separated by a narrow groove from the hinge-plate be- 
low. A large subcentral cartilage pit is bounded in front by 
a comparatively long diverging cardinal tooth, and behind 
by a thinner, lower, and shorter diverging lamina. The 
long antero-lateral tooth is separated from the margin by a 
groove, and the postero-lateral tooth is marginal. 
Two other valves have furnished the illustrations of the 
hinge of this species, which may be more fully described 
thus: accepting Bernard’s conclusion for his genus that the 
anterior is the produced side. ‘The right valve has a diverg- 
ing front cardinal tooth, and a long antero-lateral separated 
from the margin by a groove; this receives the antero-lateral 
marginal lamina of the left valve; this lamina is continued 
as a sort of hook round the dorsum of the right cardinal, and 
as a diverging left cardinal down its posterior side, where it 
rests on a low narrow shelf at the base of, and forms the 
socket of, the right cardinal and also the anterior wall of 
