KNIGHT-FISHES. 89 



To this family also belongs the curious little fish known 

 as the Roughy (Trachichthys australis). This inhabits very 

 similar situations to those in which the Nannygai is found, 

 viz., rocky bottoms and bomboras, where it may be captured 

 occasionally, either by hook and line or by means of the 

 trammel-net. It is also sometimes taken in the lobster-pots, 

 but never in any abundance. The peculiar rough body 

 whence its name is of a deep reddish-brown, the fins being 

 yellow and black. When fresh it has a most pleasing appear- 

 ance, though very curious-looking. Like the Nannygai, the 

 Roughy has large eyes to enable it to see well in the deep 

 water that it usually frequents, and where the light is re- 

 duced to a kind of twilight. 



KNIGHT-FISHES. 

 (Family: Monocentridte.) 



ONLY two species of these very remarkable Knight-Fishes 

 are known to exist ; and one of these, known as the Aus- 



Fig. 34. KNIGHT-FISH (Monocciitri* inponicus). 



tralian Knight - Fish* (Monocentris gloria-maris) , is 

 found on the coast of New South Wales and Queensland. 



* Not having a specimen of this species at hand, I have given an 

 illustration of the closely allied Japanese species f Monocentris japonicu*) 

 which will probably be found to occur on portions of the Australian coast. 



