[Reprinted from SCIENCE, N. S,, Vol. XIX., No. 

 4-9Z, Pages 867-868, June S, 1904. ] 



ALBINO BROOK TEOUT. 



Among the brook trout hatched at the 

 Adirondack Hatchery, Saranac Inn, N. Y., 

 in March, 1902, there appeared to be some dis- 

 tinct albinos. There were about fifty of 

 these fry out of an entire hatching of 800,000 

 ordinary brook trout eggs, taken from both 

 wild and confined trout. These albinos were 

 put by themselves, and four reached maturity. 



Two of them are tjrpieal albinos. They are 

 the same in outline as the ordinary brook 

 trout. The skin is white, mottled with an 

 ochraceous yellow, colored with the typical red 

 and yellow spots. The fins are white, with 

 the red band and yellow mottling. Eyes red. 

 The general appearance of the fish is delicate, 

 and the bones are apparently visible through 

 the seemingly transparent skin. As these fish 

 were reared in captivity they have been con- 

 fined to the ordinary fish races, and fed on 

 ground liver. One is a male, the other a 

 female. The former now measures seven 

 inches in length; the latter, nine inches. 



The other two fish are a grayish white, with 

 dark fins and black eyes. 



On November 10, 1903, when the two 

 albinos were twenty months old, they were 

 stripped for eggs and fertilization. At this 

 time their combined weight was approximately 

 one half pound, the female being much the 

 larger. Mr. G. E. Winchester, foreman of 

 the Fish Hatchery, made the following experi- 

 ments in fertilization : viz., first cross, 527 eggs 

 from female albino X albino male; second 

 cross, 103 eggs from female albino X natural 

 male; third cross, 424 eggs from natural fe- 

 TTifilf V albino male. 



