242 GIM.AROO. 



fin two inches and a half, rising higher at the hack, and 

 deeper at the helly than the kindred species, compared with 

 which also the under jaw is shorter and more feeble, the 

 snout more obtusely rounded, the setting on of the pectoral 

 fins thrust more forward under the plate which borders the 

 gills, and which is turned up to give them place; the pectorals 

 and ventrals also proportionally longer; the anal rather smaller; 

 the tail less expansive. As regards colour, it is probable that 

 the Gillaroo is as much liable to variation as the Common 

 Trout; but the specimens under notice nearly resembled each 

 other. On the head brown, bluish brown along the back; 

 higher portion of the sides tinted with pink, verging into 

 yellow, and on the belly white. Cheeks yellow, as are the 

 pectoral, anal, and ventral fins; the dorsal dusky, with black 

 spots and pale anterior border; adipose fin dark, with a black 

 spot, but without a red border, as in the Common Trout. Mr. 

 Thompson mentions some bright red spots on this fin, but he 

 says nothing of a red border or a diffused redness. Vermilion 

 spots are scattered over the sides, with no particular reference 

 to the lateral line; there are also numerous dark spots on the 

 cheeks and along the back, but none of these spots are 

 encircled within a light border, as usual in the Trout. The 

 teeth strong on the tongue; the palatine teeth wide at the 

 base, and pointed, those on the vomer irregular; a narrow 

 veil in front of the palate. The flesh a rich salmon-colour. 

 On attempting to preserve the skin it was found to be softer 

 than in the Trout, and to stretch more readily; but this might 

 arise from the length of the journey before it came into my 

 possession. 



