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 



Caledonia N. Y. ikdale X V . 



June !0, 1896 Wai '2-',, ;8<)7 



Jaiues Auuiii jr G. P. Slade 



Extreme length ................................ 9% 



Length of middle caudal rays from end of scales. % 



Depth of body .................................. 17s 3y s 



Least depth of caudal peduncle ................. % 



Length of head ................................ 2 3% 



Length of snout ................................ % l 1 /^ 



Length of upper jaw ............................ 1% 



Length of lower jaw ............................ 1% 



Diameter of eye ................................ TB -fe 



Distance from snout to dorsal origin ............. 3% 



Length of dorsal base .......................... 1 ** 



Length of longest dorsal ray .................... ITS 



Length of last dorsal ray ........................ % 



Distance from snout to ventral origin ............ 4*/ 2 



Length of ventral ............................... 1% 



Distance from snout to anal origin ............... 6 .... 



Length of anal base ............................ % 



Length of longest anal ray ...................... 1% 



Length of last anal ray .......................... % 



The Caledonian specimen has no hyoid teeth; the vonierines- 

 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 



