258 



NEW YORK STATE MUSEUM 



with a small-scaled one, the hybrid will be large-scaled which- 

 ever way the cross be made. The hybrid between the brown 

 trout and the brook is a large-scaled form, and it is sterile as 

 far as reported. The aquarium has had this hybrid from the 

 South Side Sportsmen's Club, and from the New York hatcheries 

 at Cold Spring Harbor L. I. and Caledonia. It is always a strik- 

 ingly handsome fish, and grows to a large size; but it is far less 

 hardy than either of its parents. The cross has always been 

 artificially made, and never occurs naturally. Two specimens 

 studied gave the following measurements in inches: 



MEASUREMENTS 



Extreme length 914 



Length of middle caudal rays from end of scales. 



Depth of body 



Least depth of caudal peduncle 



Length of head 



Length of snout 



Length of upper jaw 



Length of lower jaw 



Diameter of eye 



Distance from snout to dorsal origin 



Length of dorsal base 



Length of longest dorsal ray 



Length of last dorsal ray 



IVi 



1% 



R 

 IB 



3% 



IfB 



1t^ 



% 



Distance from snout to ventral origin 4^^ 



IVs 



6 



Vs 



Length of ventral 



Distance from snout to anal origin. 



Length of anal base 



Length of longest anal ray 



Length of last anal ray , 



78 



The Caledonian specimen has no hyoid teeth; the vomerines 

 are in a very small patch on the head of the bone only. The gill 

 rakers are 4+10, the longest about one half the diameter of the 

 eye. It has about 124 tubes in the lateral line. Branchiostegals,. 

 10. The following color notes were taken from the fresh fish. 

 Dorsal fin with numerous dark blotches resembling those of 

 young rainbow; adipose long and slender, amber color with two 

 obscure dusky blotches, one of these very indistinct; lower half 

 of sides pink; ventral, anal and caudal pink; ventral and anal 



