146 Thirty-fourth Annual Meeting. 
has said in regard to the distribution of trout and grayling nat- 
urally, in the state of Michigan. The inference to be drawn from 
Dr. Henshall’s paper, as I understood it yesterday, was that the 
trout and grayling inhabited the same waters indiscriminately. 
According to our best information that is not true. The trout 
belt and grayling belt of Michigan were clearly defined. The 
great natural trout belt of Michigan was the upper peninsula, 
and there is today and never has been but one grayling stream in 
the upper peninsula, viz., Otter river. The great natural gray- 
ling belt was in the lower peninsula; and these streams contained 
no brook trout. Those that contained the grayling had no brook 
trout naturally, except possibly a few where the dividing lines 
nearly joined; but practically the grayling streams contained no 
trout, and vice versa. ‘Today, of course, grayling are practically 
extinct, but the streams are all now strictly first class trout 
streams, made so through the introduction of fish from the hateh- 
erles. 
Mr. Titcomb: I want to ask a question on that point. Was 
the depletion of the grayling caused by the introduction of the 
trout ? 
Mr. Bower: ‘That is a mooted question. Dr. Henshall says 
it is principally through the running of logs destroying the 
spawning beds. But the introduction of trout is a factor at least. 
Of course the introduction of any kind of fish where there is only 
one variety, as there was practically in the case of grayling, would 
supplant the single variety to a greater or less extent. My own 
opinion is that those streams will never be restored as grayling 
streams because they are stocked with trout. 
Mr. Titeomb: On Mr. Clark’s reference to Dr. Henshall’s 
paper, and the effects of irrigation on the fishing, I think that 
matter is just as important as the protection of the Yellowstone 
Park, and I think there should be some action, state or national, 
or both, in that respect; and I believe that a resolution should be 
drawn by the resolutions committee on that subject. I get 
reports from other sources than those to which Dr. Henshall has 
access, from other superintendents and persons applying for 
fish; I note that the irrigation situation is growing worse and 
worse every year, and extending from one place to another. Even 
