46 FISHES OF THE CONNECTICUT LAKES. 
species. The colors of both sexes become brighter, brown, orange, 
and yellow and blue appearing on the bodies, especially the male, and 
faint orange spots appear on the tail, which at other times is spotless. 
The salmon practically cease feeding at this time. They probably 
do not breed oftener than every other year. 
The salmon of First Connecticut Lake probably spawn in the Main 
Inlet. Judging from their size, young salmon remain on the spawn- 
ing grounds or in the streams for one, two, or even three years. 
Salmon parrs frequently have red spots on the side. 
By many it is considered necessary to screen lakes to retain land- 
locked salmon. This seems wholly unnecessary unless it is desired 
to restrict a// to the lake. Some young salmon will be carried down- 
stream by freshet, and under favorable conditions others will vol- 
untarily go down into outlets of lakes, but will not traverse un- 
congenial places for any great distance. Occasionally one or more, 
perhaps, may make their way to salt water, but not in sufficient num- 
bers to deplete the lake. Then, too, the screens usually employed will 
prevent only large fish from entering the outlet, and not being fine 
enough to prevent young salmon from passing through are, therefore, 
a useless expense. 
Fic. 3.—Rainbow trout, female. 
16. Ratnsow Trout. Salmo irideus Gibbons. 
Plate x and fig. 3. 
Head 4.66 in length without caudal; depth 3.50; eye 4.66 in head; snout about 
4; dorsal 11; anal 11; scales 21-135 to 140-20. 
Head short and deep; snout short; mouth large, maxillary not quite reaching 
to below posterior margin of eye; vomerine teeth in 2 irregular rows; body 
short and deep; caudal peduncle rather deep, about 2 in head; dorsal origin a 
little nearer tip of snout than base of caudal; length of dorsal base 7.5 in length 
of body without caudal, slightly exceeding longest ray; last dorsal ray 2 in 
longest; anal base a little less than 2 in head, the longest ray about equaling 
longest dorsal ray. 
Upper parts greenish blue, sometimes purplish; sides more or less silvery, and 
profusely spotted with small black spots which are most numerous above the 
lateral line; head, dorsal, adipose, and caudal also black-spotted. In the 
spring breeding season the broad crimson lateral band becomes brighter, and the 
sides of both sexes are iridescent purplish. (After Bean.) 
