~ 
BY J. DOUGLAS OGILBY. ae 5 
of first gill-sht % of the diameter of the eye and 3 of that 
of the last shit. Length of head and trunk ¢ of that of the 
tail. First dorsal fin originating above the middle of the 
base of the ventral, its distance from the tip of the snout 
24 in the total length ; anterior and outer borders of fin 
sublinear, the intervening angle broadly rounded ; posterior 
angle pointed, the hinder border proximally emarginate, 
its length 14 time the diameter of the eye and rather more 
than 4 of its basal length, which is 1} time the vertical 
height of the fin: second dorsal similar to but not quite 
so large as the first, its distance from the origin of which 
is 12 in that from the tip of the tail. Distance between 
origin of anal and second dorsal less than the interval 
between the dorsals and 43 in its distance from the ventrals ; 
its height is 2% in its base ; free space between anal and 
caudal 14 in the base of the anal. Depth of lower caudal 
lobe 61 in its length, which is 47 in the total length, its 
extremity rounded; tip of vertebral column not nearly 
reaching the margin of the fin. Pectoral fin obovate, its 
distance from the ventral 2 of that from the tip of the snout, 
its base rather more than 3 of its greatest width and rather 
less than 4 of its length, which is $ of that of the head. 
Origin of ventral fin a little nearer to the first dorsal than 
to the pectoral. A slight but distinct vertebral groove 
between the occiput and the first dorsal; lateral line 
strongly marked forming a ridge, connected by a trans- 
verse line above the spiracles. Upper surfaces, sides, and 
tail ashy gray ; lower surface of head, throat, and abdomen 
white. (Named for my friend Mr. John Colclough, late 
of Brisbane, and now holding a responsible position in the 
Aru Islands). 
Total length of type 460 millimeters. 
Coast of Queensland. 
Type in the collection of the Amateur Fishermen’s 
Association of Queensland. 
Described from an immature male caught at Mud 
Island, Moreton Bay, on June 8th, 1906, by Mr. F. L. 
Phillips, and presented by him to the above collection. 
Cat. No. 410. 
There is a second specimen of about the same size in 
the State Museum. 
