Bull. U. S. B. F., 1914. 



Plate LXXIX. 



Fig. S. — Seining fish from overflow water for infection with glochidia of mussels. (See text, p. 403.) 



Fi'). 10. — Seining fish in Lake Pepin for mussel propagation. 



Fig. II. — Transferring the fish to the infection tank. The 

 foreman standing in the boat is pouring the glochidia 

 from a can into the tank. (See text, p. 400.) 



Fig. 9. — Sorting the fish for infection with glochidia. 



