PISCES 



369 



the fisheries and for the better regulation of the same. The 

 United States Fish Commission in conjunction with similar 

 state boards, has done an immeasurable amount of good espe- 



FiG. 183. 



Fig. 183. Atlantic Salmon (Salmo salar). From the "Manual of Fish Culture," U. S. F. C, 



Questions on the figure. — What are the names of the various fins shown in the 

 figure? What is the dotted line along the side of the fish? What type of tail 

 has this fish? 



Fig. 184. 



-— — ^-^ r • T- 1 



Fig. 184. Brook Trout (Salvelinus fontinalis). From " Manual of Fish Culture," U. S. F. C. 



cially in the following particulars : 



I. In taking the spawn of our most important food fishes 

 and caring for it artificially during the period of early develop- 

 ment when the young animals are in the greatest danger of 

 24 



