THE ALBINO BROOK TROUT. 297 



The fry from the pure albino strain all died within sixty days from time of 

 hatching. Their characteristics of color were pure albino. Their weakness 

 is indicated in that only six per cent of the eggs proved fertile, and that several of 

 the fish were imperfect. Those that hatched from the second cross all died 

 within thirty days. Those from the third cross are all living and making a fine 

 growth. As the fry from the eggs of the pure albino female lived so short a 

 time it would indicate her weakness. 



On the other hand, the eggs of a wild trout fertilized by the albino male 

 produced a higher percentage of fertile eggs than is generally secured in fish 

 culture. One hundred of the fingerlings from the third cross were given 

 to the Carnegie Institute, for research work at their laboratory, Cold Spring 

 Harbor, N. Y. The fry from both the second and third crosses resembled 

 almost entirely their natural parents, the albino characteristics having practically dis- 

 appeared. 



Some fry from both ordinary trout and the pure albino were sent to 

 Dr. Charles K. Winne, Jr., of the Bender Laboratory, Albany, N. Y., who made a 

 microscopic examination and reported as follows: "The ordinary fry contain an 

 abundant layer of pigment in and just beneath what would correspond to the epider- 

 mal layer in human skin. In the albino fish there is absolutely no appearance of 

 pigment anywhere." Hence it is conclusive that this difference of color is simply 

 one of presence or absence of pigment under the outer skin. These fish were 

 exhibited at the State Fair, in Syracuse, last fall, where the male died on 

 account of someone shutting off the water supply from the tank. The male at that 

 time had reached a length of nine inches. The female is now ten and one half 

 inches long } and will weigh about half a pound. 



Albino*} at Private Hatcheries. 



Mr. James Annin, Jr., proprietor of the Caledonia Trout Ponds, says: "I 

 have had quite a number of albino brook trout hatch m past years, but have 

 no memorandum on this subject. In 1902 I had four or five fine albino yearlings 

 that I raised from fry. In the spring, when they were yearlings, we placed 

 them with some brook trout yearlings in a tank provided with plenty of shade. 

 But with all our care, as they were so conspicuous, the kingfishers got them all 

 before they had been in the tank a week. I have hatched albinos from both 

 wild and domesticated brook trout. I have also hatched albino brown trout. These 

 fish were a creamy white with pink eyes. At my Randolph Hatchery, in 1899, I had 

 an albino brown trout that weighed nearly three pounds. I gave this fish to 



