SECOND DAY.J VARIETIES OF TROUT. 65 



PHYS.I am somewhat amused at your idea 

 of the change produced in the species of trout 

 by the formation of particular characters by 

 particular accidents, and their hereditary trans- 

 mission. It reminds me of the ingenious but 

 somewhat unsound views of Darwin on the same 

 subject. 



HAL. -I will not allow you to assimilate my views 

 to those of an author, who, however ingenious, is far 

 too speculative ; whose poetry has always appeared to 

 me weak philosophy, and his philosophy indifferent- 

 poetry : and to whom I have been often accustomed 

 to apply Blumenbach's saying, that there were many 

 things new and many things true in his doctrines ; 

 but that what was new was not true, and what was 

 true was not new. 



POlET.\. think Halieus is quite in the right to 

 be a little angry at your observation, Physicus, in 

 making him a disciple of a writer, who, as well as I 

 can recollect, has deduced the genesis of the human 

 being, by a succession of changes dependent upon 



elusive of the salmon (Salmo salar), three distinct species of the trout : 

 two migratory, the salmon trout, or salmon peal (Salmo trutta), and 

 the sea trout, or bull trout (Salmo eriox) ; and one not migratory, the 

 common trout (Salmo fario)', each possessing certain distinctive 

 structural marks, especially in the relative proportions of their maxillae. 

 Ample information is given on this subject in Mr. YarrelPs " Histoiy 

 of British Fishes." J. D.] 



