forest, fish axd game commissioner. 215 



Blue Pike. 



This is one of the small forms of the common pike perch, although it is 

 usually distinguishable by its size and color. It spawns near Dunkirk- 

 later than the large form of pike perch living in Oneida lake and other New 

 York waters, and its eggs have been artificially hatched in large numbers 

 by some of the States. It is well worthy of more attention than it has thus 

 far received. 



Trout Perch. 



This remarkable little fish combines the adipose dorsal fin of a trout 

 with the spiny scales of a perch. It lives in Oneida lake and from there 

 ascends Scriba creek, at Constantia, in great schools in the spring, to spawn. 



PIKE PERCH 



This is. one of the favorite foods of the pike perch, and, singularly enough, it 

 is often mistaken for the young of that species. 



Soon after the arrival of the trout perch in Scriba creek its eyes are 

 affected by an unknown disease apparently of bacterial origin, and one 

 eve or both eyes in numerous individuals are completely destroyed and 

 removed from the skull. Desiring to learn something about this interest- 

 ing and extremely fatal malady, which also affects young yellow perch, 

 black bass, and several other species, some specimens were preserved in 

 alcohol, glycerine and water and were submitted to the United States 

 Bureau of Fisheries for examination. Xo satisfactory results could be 

 obtained without study of living materials in the field, but Mr. Marsh, to 

 whom the specimens were referred, recognized the nature of the disease and 

 made some preliminary remarks upon it. 



