SECOND DAY.] 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. 



POIET.^l. 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 (Salmosalar), 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. Yarrell's " History 

 of British Fishes." J. D.] 



