A POPULAR MISNOMER, 8l 



BLACK TREVALLY. 



Black Trevally {Siganus nebidosus). 



Plati; XLIX. 



This is not related to the true Trevallies belonging to 

 the Yellowtail family. The popular name is, therefore, as in 

 a number of other cases, decidedly misleading. Though fre- 

 quently not to be seen in the markets for months at a time, 

 large shoals occasionally appear in Port Jackson and the 

 waters in the neighborhood, when comparatively small 

 quantities are captured and brought in for sale. Not being 

 recognised as a choice fish, and being usually of small size, 

 it does not command a high price, though finding a ready 

 sale. 



The family of fishes to which this one belongs is essentially 

 a somewhat tropical one, and in the present instance, the 

 species is found to be more abundant as we proceed in a 

 northerly direction. 



The Black Trevally attains a length of about lo inches. 



A closely allied fish, known as Siganus javiis, and which 

 is commonly classed with the Black Trevally just mentioned, 

 also occurs on our coast. It is very similar in structure and 

 habits to the latter. 



THE POMACENTRIDS. 



Scalyfin {Parma microlepis). 



i'l.ATE L. 



This is the only one of the New South Wales Pomacentrids 

 which at present merits any attention as an edible fish. It 

 is a small iish, attaining commonly a length of about 8 inches, 

 and is found swarming around our rocky shores in great 

 numbers. It can hardly be recognised as a market fish, 

 although odd examples are to be seen occasionally mixed in 

 with the products of the trammel-net. 



