viii PREFACE. 



He has limited his description of fish to 

 the varieties of the Salmo most usual in the 

 fresh waters of Europe, and which may be 

 defined as a genus having eight fins, the 

 one above the tail fleshy, and without 

 spines. 



It is to be hoped M. Cuvier's new work 

 on fishes will supply accurate information on 

 this genus, which is still very imperfectly 

 known. 



LONDON : 

 March 1, 1828. 





