The Identification of Salmon and Trout. 1 59 



thyologist who has Been them will deny their 

 specific rank; but in numerous other cases, 

 one is much tempted to ask whether we have 

 not to deal with a family which, being one of 

 the most recent creation — no fossil true Salmo 

 being known — is composed of forms not yet 

 specifically differentiated." 



