On The Origin Of Species By Means Of Natural Selection Or The P
Chapter 11
GEOGRAPHICAL DISTRIBUTION.
Present distribution cannot be accounted for by differences in physical conditions--Importance of barriers--Affinity of the productions of the same continent--Centres of creation--Means of dispersal, by changes of climate and of the level of the land, and by occasional means--Dispersal during the Glacial period co-extensive with the world
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