BULLETIN OF THE UNITED STATES FISH COMMISSION. 23 



arcs or rods which are not disposed radially, butjconceutrically to the 

 base of the flu. These folds appear so far back on the embryo that their 

 genetic relation to the gill arches appears imi^robable. The fin is dis- 

 placed forwards with the growth of the young fish, and its base rotates 

 through an angle of ninety degrees in acquiring the upright position. 

 Philadelphia, April 20, 1881. 



REARIiVO OF CAI.IFORIVIA MOUNTAIIV TROUT (SAliITIO IRIDEtJS). 



By SETH €}BE£]\. 



(Extract from a letter to Prof. S. F. Baird, May 3, 1881. ) 



I have 220 six-year old California mountain trout, some of them weigh- 

 ing 3 pounds, and 10,000 three-year old that we are taking the spawn 

 from now. One day last week we took 88,000 spawn. We shall have 

 next year 30,000 more three years old. We have orders for all we shall 

 take this year. But next year we shall have many millions. They are 

 a hardy game fish. They spawn in the spring, and hatch in streams a 

 much larger i)ercentage than our trout. They will live in any streams 

 that our trout will, and in many warmer streams that our trout will not 

 live in. This is the fourth season that we have taken the spawn, and 

 every year a good many have hatched in our spawning-races. We never 

 saw one of our trout or salmon-trout hatched in the races. Seven years 

 ago I got 300 of their eggs ; we hatched and raised 275; when they were 

 three years old we took 64,000 eggs and raised 10,000 for breeders. The 

 next year we had 260 of the old stock, and took 90,000, and raised 30,000 

 for breeders and distributed the rest. Last year we had 220 of the old 

 stock; we took 80,000 eggs and are raising 12,000. 



SAIiMOIV CAUOHT IIV GE:VESEE RIVER, IVE^V VORK. 

 By SETH OREEIV. 



New York State Fishery Commission, 



Office of the Superintendent, 



Rochester, N. Y., 2Iay 3, 1881. 

 * * * : Last week five salmon were caught in the Genesee River, 

 weighing from 3 to 10 pounds. They were caught in small scoop-nets. 

 The falls are seven miles from Lake Ontario. They are 87 feet in per- 

 pendicular height. Eighty rods above is another fall of 90 feet. Then 

 the river, 90 miles to its head in the Allegheny Mountains, is a clear 

 stream for 40 miles. Then it comes on large flats with clay banks, 

 and becomes very roily during floods. The young salmon were put 

 in the tributaries above the falls. They have gone over the falls and 



