American Fislwries Society 163 



data recoi-fled here. While my oljservalicjiis are very incDin- 

 plete and constitute only a fragmentary preliminary com- 

 munication, yet they are positive in certain respects and 

 afford an intersting" comparison with the hetter known and 

 more aristocratic Atlantic salmon. 



As I am now on my way to Alaska to complete studies 

 begun on that prexious trip, it may he possiljle later to add 

 more data to those already noted down on the jumping 

 powers of this salmon. Meantime I sliould be indel)ted to 

 any of the members who may Ije al)le to point me to published 

 evidence concerning other detinite observations on this or 

 related species. 



The observations recorded here weie made al)out the mid- 

 dle of the run of salmon on X^aha stream, near T.oring. 

 Alaska. About half wa}- from salt water to Heckman Lake, 

 in which these salmon regularl}- he to ripen for spawning 

 and on which the Alaska Packers ,\ssociation has a large 

 hatchery, one finds the only fall in the course of the stream 

 which is more than a rapids. 1diis is known as Dorr brails 

 and forms a straight drop about three or four feet high with 

 only one break, near the left l)ank. Here a spur of rock 

 leads out oblique]}' awa}- from the crest of the fall in such a 

 way as to gi\e an unbroken flow of water al)out a foot lower 

 than the general level above the fall. The salmon go up 

 from salt water in bunches or schools, usually starting at the 

 time of a heavy lain. which, owing to the character of the 

 drainage basin, raises the le\'el of the stream ver}- promptly 

 and markedly. When such a school has reached the deep 

 pool at the base of the fall they apparently rest a short time 

 and the following day ma}- l)e found actixel}- engaged in the 

 effort to surmount the falls. While Ave watched tlic pool, the 

 jumping seemed contiimous, as if not merely a single hsli 

 but several at least were in the air at once, and it was only 

 rarely that one could note au}- intermission between the 

 jumps. Yet the camera gave evidence of the deception prac- 

 ticed on the eye. Of .some thirty snaps taken at random 

 when the jumping seemed most frecjuent, on!}- six caught fish 



