BULLETIN OF THE UNITED STATES FISH COMMISSION. 471 



125 — MOVEMENTS OF MAC KEREE. 



By Capt. Z. L. TANNER. 



[From a letter to Prof. S. F. Baird.] 



I have just read Captain Martin's letter of September 1. We saw- 

 mackerel ten days later NE £ E, 129 miles from where Captain Pluni- 

 mer saw them, and in practically the same temperature, 69°, on the 

 verge of the Gulf Stream. It is my impression that we saw the same 

 school, as a movement of 13 miles per day would have placed them in 

 our locality. We passed over the region referred to between the 2d and 

 5th inst., and on the latter date were at the spot where the mackerel 

 were reported to have been on August 23. 



Steamer Albatross, Wood's Holl, Mass., 



September 7, 1883. 



126.-SIJCCESS IN PROPAGATING CALIFORNIA MOUNTAIN TROUT 

 FROM EGGS RROUGHT TO MICHIGAN BY THE UNITED STATES 

 FISH COMMISSION. 



By MARTIN METCALF. 



[From letters to Prof. S. F. Baird.] 



I am now taking the eggs of the California mountain trout from fish 

 reared from the ova furnished by the United States Commission three 

 years ago the present month. I have individual fish of this species, 

 reared from the eggs aforesaid, that will weigh hard on to 3£ pounds. 

 Shall endeavor to-morrow to fertilize a few eggs with the milt of the 

 Michigan grayling. 



Battle Creek, Mich., March 3, 1883. 



I should take exception to the proposed expunging of the words 

 "more vigorous"* as applied to the rainbow trout in comparison to 

 what is called brook trout proper. 



After an experience of four years with this variety, kept under like 

 conditions, I can say that, icith me, they are so much "more vigorous," 

 hardy, voracious, and desirable every way for our Michigan streams, 

 now denuded of forests, that the brook trout is not to be thought of in 

 comparison. 



During spawning time — that time of trial to all the salmonoids kept 

 in comparative confinement — the California mountain trout thrive and 



* The reference is to remarks of Livingston Stone, on pp. 11-12 of F. C. Bulletin, 

 1882, Vol. II, where he proposed "more hardy" as a better phrase than "more vigor- 

 ous" when comparing California trout with brook trout. — C. W. S. 



