3o8 THE DRY-FLY MAN'S HANDBOOK 



their generally greater size they are very similar in 

 character and appearance to those of the trout. 



The presence of salmon in a trout-stream is to be 

 deplored. It sounds in some 

 Salmon in a trout- ways curious, but I am firmly 



stream. convinced that the extermina- 



tion of every salmon in a 

 Hampshire chalk-stream would be of incalculable ad- 

 vantage. Conversely, the interests of every preserver 

 of salmon would be served by the removal of every 

 trout from the river in which his work of preservation 

 is being carried on. Each disturbs the other on the 

 redds, and the trout certainly devour when they can 

 get them the fertilized or non-fertilized eggs of the 

 salmon. The opposition of all the Test and Itchen 

 trout fishermen to the suggested inclusion of a large 

 part of these streams in the Avon and Stour Con- 

 servancy was due to an intimate knowledge on their 

 part of the impossibility of preserving both efficiently. 

 The best of the chalk-streams always contain a 

 luxuriant growth of weeds of 

 Weeds. the kinds in which the food of 



the trout and grayling delights 

 to live. When inspecting a water special attention 

 should be paid to this point. Water celery {Apium 

 inundatum), water crowfoot [Ranunctilus aquatilis), 

 and starwort {Callitriche vernus or C. autumnalis) are 

 the forms of weed in which the nymphs of the small 

 Ephemeridae, the caddis, or larvs of the Trichoptera, 

 as well as crustaceans, such as Gammarus pulex, the 



