[133] Ehrenberg, ibid. p. 390.
[134] Journ. of Asiat. Soc., vol. i. p. 240.
[135] Rafinesque, Atlantic Journ., p. 18.
[136] Darwin's Journal of Travels in South America, &c., 1832 to 1836, in Voyage of H. M. S. Beagle, p. 159.
[137] Ehrenberg, ibid.
[138] The speculations which follow, on the ancient physical geography of Siberia, and its former fitness as a residence for the mammoth, were first given in their present form in my 4th edition, June, 1835. Recently Sir R. Murchison and his companions in their great work on the Geology of Russia, 1845 (vol. i. p. 497), have, in citing this chapter, declared that their investigations have led them to similar conclusions. Professor Owen, in his excellent History of British Fossil Mammalia, 1844, p. 261, et seq., observes that the teeth of the mammoth differ from those of the living Asiatic or African elephant in having a larger proportion of dense enamel, which may have enabled it to subsist on the coarser ligneous tissues of trees and shrubs. In short, he is of opinion, that the structure of its teeth, as well as the nature of its epidermis and coverings, may have made it "a meet companion for the reindeer."
[139] Pallas, Reise in Russ. Reiche, pp. 409, 410.
[140] Nov. Com. Petrop. vol. xvii. p. 584.
[141] Nov. Com. Petrop. vol. xvii. p. 591.
[142] Quart. Journ. Geol. Soc. Lond. vol. iv. p. 10, Memoirs.