THE BEHAVIOR OF A PARASITIC COPEPOD 



57 



mx.2- 



•.■•■• :- : .". ;.'.•'•:'•: -ly-v-:-,^^^ 

 ■•" '•'..■ :■■ ." ■'.-•••-.'.■". ' .'• •'■'■:.'■ :,, .vvlr™ 



Figure 6. Lernaeopoda edwardsii. Larva attached by frontal margin, x 110 

 f. m. =frontal margin. 



g- =gill- 



mx. 2=seeond maxilla. 



found fastened by their frontal margins. Figure 6 is a camera 

 lucida drawing of a larva of Lernaeopoda edwardsii thus attached. 

 Let us now come back to the infection of the fish. In order 

 to study the problem further, a floating cage was sunk in one 

 of the hatching tanks, and into it were placed healthy specimens 

 of-brook trout, rainbow trout and perch. The fish were exam- 

 ined two days after the sinking of the cage and the brook trout 

 were found to be the only species infected; the others were all 



