BY W. MACLEAY, F.L.S. 333 



black dots. Tail immaculate, or with black, never with white, 

 dots. Young with scattered large black dots. 



Port Darwin, Fair Cape. (Chevert Exp.) Length fifteen 

 inches. 



1033. Ostracion rhinorhynciius, Bleek. 



Atl. Ichth. Ostrac., p. 37, pi. 1 & 3.— Gunth., Cat. Fishes, VIII., 



p. 263. 



Carapace four-ridged, without spines, forming a continuous 

 bridge across back of the tail. The median line of the back is 

 distinctly raised. Inter-orbital space very slightly concave. 

 Snout with a hump, which in adults is but little below the level 

 of the forehead. Back and tail, and sometimes the sides with 

 numerous small brown dots (2-10 on one scute). Abdomen 

 immaculate. 



North-west Australia. (Duboulay.) 



1034. Ostracion diapiianus, Bl. 



Gunth., Cat. Fishes VIII., p. 264.— Hollard, Ann. Sc.Nat. 1857, 



VII., p. 157. 



Aeanthostracion comutus, Bleek., Atl. Ichth., Ostrac, pi. 2 and 4. 



Carapace four-ridged ; the broad bridge across the back of the 

 tail is formed by four transverse series of scutes. A pair of short 

 conical spines divergent, and pointing forwards in front of the 

 orbits. A triangular compressed spine in the middle of the back ; 

 generally a small spine on each dorsal ridge, opposite to the 

 central spine. Ventral ridge terminating behind in a strong flat 

 spine, and frequently with two other smaller spines on the side. 

 Interorbital space deeply concave. Caudal fin of moderate length. 

 Sometimes of uniform coloration, sometimes with bluish, some- 

 times with black spots. 



Port Jackson. 



