155 
Body of a grey colour, with a few irregular green spots on the 
back ; upper part of the head green, with the sides blue ; on 
these there are numerous longitudinal niidulating narrow lines ; 
the posterior margin of the scales, on the sides of the body, are 
pink, as are also the throat and the fins ; the dorsal, caudal, anal, 
and ventrals have a rather broad black margin ; the three first 
are covered with irregular narrow spots, forming oblique lines 
on the dorsal and anal, and transverse ones on the candal. 
Seen several times in the Melbourne Market. In size never 
more than from 5 to 6 inches long. 
Not A. — I should have taken this for Balteatus, if any of the 
specimens I have seen had shown any trace of the dark band 
from which the name of the sort has been derived. 
OLISTHOPS. 
Dr. Richardson formed this genus in the “ Annals and Maga- 
zine of Natural History for 1850,” and gave a figure of the sort 
he knew in the “ Proceedings of the Zoological Society ” of 
the same year. Dr. Gunther changed the name to Olis- 
tkerops ; but I see no sort of use, nor even of right, in 
these so-called rectifications. The latter author charac- 
terises the genus thus: — “Head entirely naked; scales of 
moderate size ; lateral line continuous ; snout of moderate 
extent ; dorsal spines numerous, flexible.” All this agrees 
well with the fish I here describe ; but the sort known is 
represented as having a blueish streak along the upper and lower 
margins of the caudal, and along the upper margin of the pec- 
toral, and may be difierent from mine. 
OLISTHOPS CVAHOMELAS. 
Olisthops cyanomelas, Richard., Ann. and Mag. Nat. Mist., 
1851, p. 291. 
Body elongate ; front part of the head rounded. Height of 
body five times in the total length ; head five and a-half times in 
the same ; orbit five times in the length of the head. Teeth like 
those of Scarus, soldered together, and forming a sort of parrot 
beak, on the edge of which the teeth are visible. Lateral line 
extending on the root of the caudal ; it is rather flexuous, and 
considerably rounded over the pectoral, running over about sixty 
scales ; these are of moderate size, and are covered-with concen- 
tric lines. On the transverse line I find nineteen scales, on the 
