BY T. HARVEY JOHNSTON AND OTTO S. HIRSCHFELD. 595 
hians. Mr. Hedley thereupon obtained from Mr. Brazier 
the solitary specimen that he had collected in 1866 in five 
fathoms of water off Sow and Pigs Reef, Port Jackson, 
compared it at our request with L. hians and informed us 
that it, as we had suspected, belonged also to that species 
as stated by Brazier (1879). We can accept the latter’s 
record of L. hians from Port Curtis too. 
Dr. Shirley who reported its occurrence in Moreton 
Bay (1910, p. 102) kindly allowed us to see his specimens 
which came from the Bribie sand banks, as well as some 
from Yeppoon. Keppel Bay. We confirm his identifi- 
eation. As already pointed out by us, L. hirundo Reeve 
from Port Curtis is based on young specimens of L. hians. 
In the Queensland Museum collection were many shells 
labelled as L. hians from Moreton Bay, but on examina- 
tion they were all found to be L. murphiana. 
The valves of L. hians have been described by a number 
of workers including Sowerby (1846, p. 338, pl. 67, fig. 4) ; 
Reeve (1859, pl. 2, fig. 12a and b) ; Chenu (1862, p. 234, 
fig. 1202, 1204) ; and Davidson (1886 p. 217 pl. 29 figs. 
12, 13). Gratiolet (1860) referred to certain points in its 
enatomy and published figures. The locality generally 
given for the species is the China Seas while Dall (1873) 
adds Amboyna in the Moluccas. 
In the Queensland Museum collection are many speci- 
mens of L. hians, two of which were in the same box as L. 
exusta from Torres Straits and were presumably from that 
locality. There are no data regarding the remainder, 
but they are probably from Moreton Bay, since Dr. Shirley 
has informed us that ZL. hians is not uncommon on certain 
of the banks there. 
The specimens were all characterised by a thin horny 
translucent shell of a very pale green colour, with the lines 
of growth sometimes of a deeper green. Occasionally one 
noticed a splash of coppery or rusty tint near the middle 
of the shell. The edges were almost colourless, while the 
centre portion was whitish or creamy owing to calcification 
in the region of the main muscle insertions. The remainder 
of the shell was very little mineralised and, as a consequence, 
dried specimens became more or less distorted (hence the 
