FISHERIES, GAME AND FORESTS. 



239 



The above detailed tabulation of the catch of the weir for the spring of 1898 

 contains the bare facts from which any person can, with proper study, derive many 

 conclusions concerning the migrations of not only the lampreys, but also the various 

 species of fishes enumerated ; but our notebook also contains the specific records of 

 many significant observations which cannot well be tabulated. Some of these we give 

 in this text. The numbers used before the name of a fish, both in the tables and in 

 this part of the discussion, refer to the numbers of the respective species in Jordan 

 and Evermann's "Check List of Fishes and Fishlike Vertebrates of North and Middle 



NO. 15.— LAMPREYS CLIMBING FALLS. 



America," published in the " Report of the Commissioner of the United States 

 Commission of Fish and Fisheries for 1895." The catch of each species is treated in 

 proper serial order. 



8a. The Lake Lamprey (Petromyzon marinus unicolor De Kay). — The table shows 

 a destruction of 1,686 specimens of this kind of lamprey, of which 589 were known to 

 be males, 551 females, and 546 of undetermined sex. Of these, 471 were caught in 

 the weir, of which 244 were males, and 227 females. Owing to the very unusual 

 amount of late rain and high water, the trap was washed out six times, and other 

 unavoidable difficulties were encountered which permitted many lampreys to pass on 

 up stream. A fairly successful effort was made to capture these before they spawned. 



