347 
and very high. The ribs may be acute and scaly, or may 
become nearly obsolete, especially behind the umbo-ventral 
ridge. 
af may attain a transverse length of 65 mm., 10 mm. 
more than that of Lamarck’s type. This may vary consider- 
ably in proportion to the umbo-ventral height, as may also 
the prominence of the curved costal scales. 
Mytilicardia calyculata, Linneus. 
Chama calyculata, Linneus; Syst. Nat., 1767, p. 11388. # 
Cardita calyculata, Lamarck; Anim. S. Vert., 1819, vol, 
fj 
i<4 
vi., 
part 1, p. 24. 
Cardita aviculina, Lamarck; op. cit., p. 26, No. 20. 
Cardita excavata, Deshayes; Proc. Zool. Soc., Lond., 1852, 
p. 100, pl. xvii., f. 1-3. 
Mytilicardia tasmanica, Tenison-Woods; Proc. Roy. Soc., 
Tasm., 1876, p. 161. 
Taken on the beach at Venus Bay, West Coast of South 
Australia; very rarely dredged. : 
Mytilicardia concamerata, Chemnitz. 
Cardita concamerata, Reeve, Mon., t. 9, f. 42. 
/ al A 
, [hecalia macrotheca, A. Adams and Angas, Proc. Zool? Soc., * 
Lond., 1864, p. 39. 
Mytilicardia concamerata, Chemnitz, Tate, Trans. Roy. Soc., 
S. Austr., vol. ix., 1886, p. 100. , 
The habitat is given as ‘under stones at low tide,” 
“Rapid Bay, South Australia” (Coll. Angas). But there were 
no specimens in Tate’s collection. I have not taken it any- 
where, nor has any collector other than Angas recognized it. 
It does not appear to have been recorded from Victoria, Tas- 
mania, or Western Australia. Possibly some shells from else- 
where were by mistake placed among those in Angas’s collec- 
tion from South Australia. 
Venericardia dilecta, E. A. Smith. 
Veal, sabia, He Rh, rh 
Cardita dilecta, BE. A. Smith; Challenger Rep., Zool., 1885, 
vol. xili., p. 213, pl. xv., f. 4, da. Dim.—Length 8 mm., height 
6 mm., diameter 55, Hab.—‘Off East Moncceur Island, Bass 
Strait,’ in 38 to 40 fathoms. 
This has been dredged in Backstairs Passage in 17 
fathoms, two alive and many valves; in 22 fathoms, two alive 
and forty-eight valves; and in Gulf St. Vincent, depth un- 
noted, many alive and dead; in 25 fathoms off Beachport, two 
poor valves; in 45 fathoms east of the Neptune Islands, one 
alive and eighteen valves; in 55 fathoms off Cape Borda, two 
poor valves; in 100 fathoms off Beachport, eight valves in 
poor and nine in moderate condition; in 130 fathoms off Cape 
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