He thinks, therefore, that we may fairly conclude that the two faunas occupied adjacent areas.
This we gather from — 371 — a general consideration of the floras and faunas, and their geographical distribution.
Among the chief proofs of climatic fluctuations are the character and the distribution of former floras and faunas.
In short, a gradual lowering of the temperature is evinced by the character and distribution both of floras and faunas.
Toward the close of the Tertiary land bridges connected the two Americas, and an interchange of faunas followed.
In the fossiliferous strata are inhumed the remains of the floras and faunas of past ages.
It is thus evident that the whiteness of the Arctic and Antarctic faunas in winter has been greatly exaggerated.
But this connection is not the consequence of a direct lineage between the faunas of different ages.
Dalquest reported Geomys bursarius from two Sangamon faunas in northern Texas.
The pocket gopher fauna known from the late Pliocene was more varied than the faunas known from any earlier time.