[93] FISHEKIES OF THE UNITED STATES. 1247 



hybrid fishes. 

 Hybrid. 



Cross between the salmon trout and the brook trout (Salvelinus- 

 fontinalis). New York Fish Commission, Seth Green, super- 

 intendent. This specimen is about a year old. 



Hybrid. 



Cross between the California salmon (Oncorhynclius chouicha) and 

 the brook trout (Salvelinus fontinalis). New York Fish Com- 

 mission, Seth Green, superintendent. 



Hybrids and young fishes. 

 A set of five test tubes containing the following specimens : 



a. Eggs of shad, Clupea sapidissima Wilson, which have been im- 



pregnated with the milt of striped bass, Roccus striatus Mitch.. 

 31,504. 



b. Hybrids hatched from eggs similar to those in a, two and one- 



half days old. 31,505. 



c. The same, nine days old. 31,506. . 



d. Shad, seven days old, eating dead ones of the same age. 31,507. 



e. Shad, four days old. 31,508. 



ACCLIMATIZATION OF FISHES. 



Numerous specimens of shad, Atlantic salmon, California salmon, 

 trout, grayling, and carp, which have been reared in waters 

 where, prior to their introduction by fish-culturists, they did 

 not exist. 



11. Statistics of fish-culture. 



Locations of hatching stations, etc. 



A map showing the operations of the U. S. Fish Commission from 

 1871 to 1883, the location of the hatching stations belonging to 

 'the TJ. S. Fish Commission, and to the fish commissions of the 

 several States, and the dates of the establishment of the State 

 commissions. It shows the locations where young fish have 

 been planted, each species being designated by a peculiar sym- 

 bol. The number of shad introduced into the different river 

 basins during the years 1880, 1881, and 1882, and the number 

 of applications for carp from each State that have been sup- 

 plied, are also indicated by colored figures. (See also reports 

 of U. S. Fish Commission and of the various state commissions 

 for statistics of eggs taken and fish hatched.) 



12. Literature of fish-culture. 



Norris, Thaddeus. 39,129. 



American | Fish-culture | embracing all the details of | artificial 

 breeding and rearing of trout; | the culture of salmon, shad 



