NOTES. 47 
MYCROCYPHUS ZIGZAG. 
I have never seen this species from the Australian Coast, 
although Mx. Tenrson-Woops appears to have been more 
fortunate, and reports it from Tasmania and Port Denison. 
ECHINOSTREPHUS MOLARE. 
I have not met with this species on the Australian Coast, but 
Mr. Morton, during a few days’ stay at Lord Howe’s Island, 
obtained a single specimen, which had worn the spines of the 
actinal surface short with burrowing in the rocks where it had 
formed a rounded cavity ; the spines above the ambitus are of 
the usual length ; it is apparently rare, as no other specimen has 
been obtained although searched for on several recent occasions. 
SALMACIS DUSSUMIERL. 
This beautiful and well marked species is occasionally found 
in Port Jackson, ou a botton of sandy mud and shells, in 8 to 
10 fathoms. It appears to be more plentiful further north in 
similar situations at Port Denison; the Museum possesses one 
very large specimen, the test being 33 in. in diameter, and 13 in. high, 
obtained in shallow water at the Solomon Islands. The flattened 
spines round the ambitus and actinostome are fluted and tinged 
with violet at the tip, the test and base of the spines pure white 
in some specimens, the spines longest on the ambitus, and 
radiating therefrom form a fringe round the margin of the test. 
SALMACIS, Sp. 
Pl. ii, figs. 1, 2, 3. 
Thisjis a very peculiar pyriform variety or species, of which 
the Museum possesses but one specimen, without any authentic 
locality.* The color of the spines above the ambitus, judging 
trom a few sticking to the denuded test, is orange-red at the base, 
white or greenish-white towards the tips, secondary and milliary 
spines white, the bosses imperforate, milled and crenulate, 
mammilla often tinged with orange-red, at the actinostome there 
is only one row of primary tubercles with a row of secondaries on 
either side ; between each plate a row of milliaries, towards the 
ambitus the secondaries enlarge and form a row of three or four 
primary tubercles across each plate, above the ambitus they 
become $small again, until only one row of primary tubercles 
reach the anal system ; the spines near the abactinal pole are 
orange red. On the plates of the ambulacral area there are 
only two primary rows of tubercles at the ambitus, and only one 
* Said to have been trawled in 35 fathoms off Port Jackson. 
