A Guide to the Study of Fishes, Volume 1 (of 2)
CHAPTER XVI.
DISPERSION OF FRESH-WATER FISHES.
The Dispersion of Fishes.--The Problem of Oatka Creek.--Generalizations as to Dispersion.--Questions Raised by Agassiz.--Conclusions of Cope.--Questions Raised by Cope.--Views of Günther.--Fresh-water Fishes of North America.--Characters of Species.--Meaning of Species.--Special Creation Impossible.--Origin of American Species of Fishes. 282