992 J.D. OGILBY AND A. R. McCULLOCH. 
outer angle broadly rounded; outer border linear or feebly 
convex, posterior border emarginate, the intervening angle 
bluntly pointed; length of hinder border about twice the 
diameter of the eye and about half the basal length, which 
is equal to the vertical height of the fin: second dorsal 
similar to and scarcely smaller than the first, its distance 
from the origin of which is 1°75 in that from the tip of the 
tail. The distance between the origin of the anal and the 
second dorsal is a little less than the free space between 
the dorsals and 3°75 in its distance from the ventrals; its 
height is 3°80 in its base, which is only separated from the 
caudal by a notch. Length of caudal fin about 6°00 in the 
total length. Pectoral fin obovate, originating a little 
nearer to the tip of the snout than to the ventral fin, its 
base 1°70 in its greatest width and 2°50 in its length, 
which is 1°25 in the head. Origin of the ventral fin about 
equidistant from the first dorsal and the pectoral. Back 
feebly ridged behind the first dorsal. Stone-gray, the upper 
surface darker, and with numerous scattered darker spots; 
young with traces of ten brown transverse bands, more 
conspicuous posteriorly, especially on the caudal fin, where 
they are permanent as three dark brown or black spots; 
these bands are continuous below between the ventral and 
the anal fins in the form of humerous crowded minute brown 
specks ; a large, round or oval, black, white-edged ocellus 
above the pectoral fin. Upper surface of head with scat- 
tered round brown spots. Dorsal fins edged with white 
and with blackish spots on the anterior border; caudal 
and anal fins brown spotted; pectorals and ventrals uniform 
or with one or two faint spots; (ocellatus, bearing ocelli: 
in reference to the humeral spots). 
Total length to 900 millimeters. Coasts of Northern 
and North-eastern Australia; Sunday Island, North-west 
Australia. Common in lagoons of coral reefs on the 
