The Identification of Salmon and Trout. 157 



the adipose fin forward to the lateral line, 

 and 20 to 22 below that line. The authorities 

 differ curiously about the identification of this 

 fish. G-unther has not been able to obtain 

 specimens of it from Scotland, and seems to 

 consider it indigenous to "Wales and the South 

 of England. He thinks it " quite possible " 

 that the typical specimen figured in Yarrell's 

 " British Fishes," " belongs to Balmo trutta; " 

 and the Salmon Commissioners of Tasmania 

 are of the opinion that the Salmo eriox has 

 not been introduced into that island. 



The Salmo quinnat has a very distinctive 

 mark from all the other salmonoids imported 

 into Australia. In this fish the anal fin has 

 from 15 to 17 rays, while in each of the three 

 other imported species it has only 11 to 12. 

 The dorsal fin has 13 rays. The vertebrae are 

 66 in number, and the pyloric caeca 155. 



Amid the confused and doubtful distinctions 

 which it has been attempted to found between 

 the different species of the salmonidas, it is 

 hard to find the way, which is rendered yet 

 more difficult by the many hybrids between 

 the different species. The power of adaptation 

 to circumstances being strong in the genus, 



