FRESH-WATER SHRIMP 



109 



with the same greediness ; and on consider- 

 ing these facts, I am surprised that there 

 have not been more attempts to imitate 

 the Fresh-water Shrimp. 



The Gammarus pulex may be found in 

 almost all streams, especially where there 

 is much vegetation. An illustration of it 

 is given on Plate I. I have however found 

 them abundant in streams where there 

 were no weeds. They hide under stones 

 at the bottom of the water and among 

 the weeds, especially among watercress 

 and star wort. Though they will live 

 in still water, I have found them most 

 numerous in streams ; and notwith- 

 standing that they are generally supposed 

 only to inhabit somewhat sluggish streams, 

 I have found them in fairly rapid ones, 

 with a stony bed. The Shrimp is very 

 prolific, and if protected increase very 

 rapidly ; thus it is a most excellent plan for 

 those who breed and rear trout to cultivate 

 them, as they are one of the most valuable 

 forms of food. 



These animals are very similar in shape 

 to their well-known relation, the common 

 Sandhopper. In colour they vary very 



