192 NATURAL HISTORY OF THE PAR. 



animalculi, &c., for the removal of which, and a 

 restoration of the fish to health, a change of place 

 is absolutely requisite, and that with migratory 

 fish, deleterious animalculi, &c., acquired in the 

 river, are lost immediately after their entrance 

 into the salt water. There can be very little 

 doubt, therefore, but that the par migrate at this par- 

 ticular season, and assuming their migrations to be 

 for a short duration only, commensurate with the 

 restoration of their health and strength, as they 

 cannot all be in a situation to leave the river at 

 one and the same time, many will have returned 

 before others will have gone down to the sea, and 

 thus more or less they will always be found in the 

 river. Be this, however, as it may, from a consi- 

 deration of the facts already stated, and which for 

 the most part have their foundation in practical 

 experience, it seems extremely difficult to look 

 upon the par in any other character than as a dis- 

 tinct species of fish." 



Theoph. — Well said, most excellent Antiqua- 

 rius ; and in every respect I entirely agree with 

 you. Herbert, I never read a more convincing 

 arg-ument. 



Herb. - - Might I add one observation to 

 strengthen it, I would say a word about the par 

 always being found in rivers where salmon are, 

 and never in parts of rivers where salmon cannot 

 get. From their hanging on scours and swift 



