INTRODUCTION, 



ON the occasion of giving publicity to the following 

 treatise, Mr Mackenzie of Arclross and Dundonnell 

 avails himself of the opportunity to subjoin in an 

 Appendix a discussion on the affinity of the species of 

 salmon with that of grilse the result of close observa- 

 tion and protracted practical experience to supply the 

 only omission in his father's production, written thirty 

 years ago, on the nature and habits of salmon ; as well 

 as to throw out suggestions on the interesting subject 

 for naturalists to meditate upon, and for praiseworthy 

 experimentalists to clear away the obscurities that sur- 

 round them. 



DUNDONNELL HOUSE, ROSS-SHIRE, 

 April 1860. 



