The eggs, after fertilization, were placed in 

 the hatchery races the same as all brook trout 

 eggs. The hatching began March 1, 1904, 

 and continued until the thirteenth of the 

 month, the period of incubation being the 

 same as that of the ordinary brook trout egg. 



The result of the hatching was as follows: 

 From the first cross 32 hatched, or approxi- 

 mately 6 per cent. ; from the second cross 43 

 hatched, or approximately 42 per cent.; from 

 the third cross 416 hatched, or approximately 

 98 per cent. 



At the present time — one month after all 

 the fish were hatched — the following number 

 is living: from the first cross 20, or 62 per 

 cent.; from the second cross none; from the 

 third cross all, or 100 per cent. 



The weakness of the pure albinos is indi- 

 cated by the fact that only 6 per cent, of the 

 eggs proved fertile, and several of these are 

 not perfect fish. Tet they have the character- 

 istics of the albino parents. 



Of the fry from the second cross 42 per 

 cent, hatched; but none were alive at the end 

 of one month. Some of them were imperfect 

 in form, and were colored more like the nat- 

 ural male parent, but not entirely so. 



From the third cross all the eggs were fertile 

 except eight — a loss of but two per cent. — and 

 all are living at the end of thirty days. There 

 are practically no cripples, and the coloring 

 is typical of the natural female parent. 



The silver gray albinos did not spawn. They 

 have the appearance of barren fish. 



These fish were exhibited by this department 

 at the New York state fair last fall and at- 

 tracted much attention. 



C. E. Pettis. 



Forest, Pish and Game Commission, 



Attiaw. N. Y.. 



