A Guide to the Study of Fishes, Volume 1 (of 2)
CHAPTER XVII.
DISPERSION OF FRESH-WATER FISHES. (_Continued._)
Barriers to Dispersion of Fresh-water Fishes: Local Barriers.--Favorable Waters Have Most Species.--Watersheds.--How Fishes Cross Watersheds.--The Suletind.--The Cassiquiare.--Two-Ocean Pass.--Mountain Chains.--Upland Fishes.--Lowland Fishes.--Cuban Fishes.--Swampy Watersheds.--The Great Basin of Utah.--Arctic Species in Lakes.--Causes of Dispersion still in Operation. 297