76 Puh. Puget Sound Biol. Sta. Vol. 2, No. 36 



they come in contact with their hosts. "Prevention before parasitisaa 

 occurs," should be our motto, rather than "cure after parasitism." 



BIBLIOGRAPHY 



Fasten, N. 



1912. The brook trout disease at Wild Rose and other hatcheries. 

 (The brook trout disease in Wisconsin waters.) Report Wis. 

 Fish Com. 191 1-1912, pp. 12-22. 



1913. The behavior of a parasitic copepod I>ernaeopoda edwardsii 

 Olsson. Jour. An. Beh., Vol. 3, pp. 36-60. 



1914. Fertilization in the parasitic copepod Lernaeopoda edwardsii 

 Olsson. Biol. Bull., Vol. 27, pp. 115-127. 



1916. The eye of the parisitic copepod Salmincola edwardsii OIssoh. 

 Biol. Bull., Vol. 31, pp. 407-419. 



Wilson, C. B. 



1908. North American parasitic copepods : a list of those found upon 

 the fishes of the Pacific Coast, with a description of new 

 genera and species. Proc. U. S. Nat. Mus., Vol. 35, pp. 431-481. 



1915. North American parasitic copepods belonging to the Lernaeo- 

 podidae, with a revision of the entire family. Proc. U. S. 

 Nat. Mus., Vol. 47, pp. 565-729. 



PLATE 18 



Fig. 1 . Young brook trout about 5 months old showing a copepod attached 

 to the gills. X about 1. 



Fig. 2. Portion of the gill of a brook trout showing numerous Salmincola 

 edwardsii attached. X about ll/^. 



Fig. 3. Floor of the mouth of a steelhead trout showing attached adult 

 females of Salmincola falculata. X about 2. 



Fig. 4. Adult females of Salmincola falculata found on steelhead trout. 

 X about 2. 



Fig. 5. Fin of steelhead trout with copepod attached. X about 2. 



