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Prof. F. Holmes on Post Pliocene Fossils 1858 in Charleston Mercury with communication from Leidy - The latter says of the fossil Horses teeth in N. America, that they vary in size from that of ordinary Horse to largest dray-horse & in structure "from that of the recent horse to the most complex condition belonging to any extinct species described, that it wd be about as easy to indicate half a dozen species as it would two."

22 & Glacial

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I shd think as most of other animals in N. America are Post-Pliocene, with 95 per cent recent – I shd think certain the Glacial

 

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do. "The remains of the Tapir in N. America do not differ from e corresponding parts of the living T. Americanus." & it may be so with the Peccary, & it is known that several of the Megatheroid animals the same in N. America & S. (& I think Falconer says so of Mastodon Humboldtus) Now we know from Lartet that within very recent times the African Elephant & 2-horned Rhinoceros ranged into Europe - so we here have parallel (only more extinction in S. America in the S. in Europe more to the North or in Siberian Fauna) which is argument for Glacial epoch having been very similar in 2 countries. (I believe that the Pampas animals, anyhow Macrauchenia lived subsequent to Glacial Epoch)

Glacial