oI2  * 
fathoms, the largest being 25 mm. antero-posteriorly, and 20 
mm. umbo-ventrally. Tate, in his original diagnosis, re- 
marked: “This species is very like C. aurora and C. Banksit, 
Adams and Angas, inhabiting Bass Straits, with regard to 
colour, ornament, and crenated margin of valves. It is, how- 
ever, of a different form, is as widely removed from C. aurora 
as that species is from (. Banksii; thus, C. Banksti is oblong- 
ovate, C. aurora transversely ovate, and C’. carnea is more 
rotund. They may eventually prove to be variations in shape 
of an aggregate species.” 
The proportion of length to height in C. aurora is 24 to 
17, or as 100 to 71. That of Tate’s type is 22 to 19, or 100 
to 86°8. That of my largest is 25 to 20, or 100 to 80. There 
fore my largest shell approximates somewhat more to the 
type of (. aurora than does Tate’s type of C. carnea, but is 
still much shorter; and as my larger shell is larger than 
Angas’s type, and is nevertheless shorter, and is an old stout 
shell, the difference is not explained by the senility of Angas’s 
shell. (@. carnea may consequently be retained for the pre- 
sent as a distinct species. b 
RT tee ritse Wren Cereemrcrem Z 
n. var, Va YA. 
Crassatella banksii, Adams and Angas, Proc. Zool. Soc., 
Lond., 1868, p. 427, pl. xxxvyil., fig. 16. Type locality—Banks 
Sage Conch. Cab. Kuster, 1886, bd. x., abt. i., p. 26, pl. vii., 
In 55 fathoms north-west of Cape Borda I dredged 16 
small and 33 large valves of a species which corresponds with 
C. Banksii in its oblong-ovate shape and truncated posterior 
end and colouring. Its dimensions, however, do not corres- 
pond. It is narrower antero-posteriorly for the same height. 
C. banksii is 16 mm. long by 10 high; mine are 12 mm. long 
by 10°2 high—hence the name angustior. My largest specimen 
is 23 mm. by 20°5. To be in proportion it should be 32°8 mm. 
long instead of 23. I have preferred to call it a variety rather 
than create another species based on this one difference. Tt 
has not occurred elsewhere, in my dredging. 
product& Verco. F/G yy 
Crassatella producta, n. sp., Trans. Roy. Soc., 8. Austr., 1895, 
vol. xix., p. 92, pl. 1., f. 2. 
Fifty valves were dredged off Cape Borda in 55 fathoms, in 
very good condition. Beyond this depth in the same neigh- 
bourhood at 60 and 62 fathoms; off the Neptunes, in 104 fa- 
thoms; and off Beachport, in 110 fathoms; from one to six 
valves in poor preservation were obtained, and none beyond. 
Its habitat is probably from 15 to 20 fathoms, up to 50. 
