[37] A similar habit is ascribed by the Chinese to the mammoth and to the gigantic Sivatherium (Fig. 6, p. 39), a four-horned stag, which had the bulk of an elephant, and exceeded it in height. It was remarkable for being in some respects between the stags and the pachyderms. The Dinotherium (Fig. 8), which had a trunk like an elephant, and two inverted tusks, presented in its skull a mixture of the characteristics of the elephant, hippopotamus, tapir, and dugong. Its remains occur in the Miocene of Europe. [Illustration: FIG. 8.--DINOTHERIUM. (_After Figuier._)] [38] "It enters Europe early in April, spreads over France, Britain, Denmark, and the south of Sweden, which it reaches by the beginning of May. It does not enter Brittany, the Channel Islands, or the western part of England, never visiting Wales, except the extreme south of Glamorganshire, and rarely extending farther north than Yorkshire."--A. R. Wallace, _Geographical Distribution of Animals_, vol. i. p. 21. London, 1876. [39] _Bible Customs in Bible Lands._ By H. J. Van Lennep, D.D. 1875. Quoted in _Nature_, March 24, 1881. [40] _Origin of Species_, C. Darwin, 5th edit. 1869. [41] Thus Mr. Wallace considers that the identity of the small fish, _Galaxias attenuatus_, which occurs in the mountain streams of Tasmania, with one found in those of New Zealand, the Falkland Islands, and the temperate regions of South America, cannot be considered as demonstrating a land connection between these places within the period of its specific existence. For there is a possibility that its ova have been transported from one point to another on floating ice; and for similar reasons fresh-water fish generally are unsafe guides to a classification of zoological regions. Mr. Darwin has shown (_Origin of Species_, and _Nature_, vol. xviii. p. 120 and vol. xxv. p. 529) that mollusca can be conveyed attached to or entangled in the claws of migratory birds. Birds themselves are liable to be blown great distances by gales of wind. Beetles and other flying insects may be similarly transferred. Reptiles are occasionally conveyed on floating logs and uprooted trees. Mammals alone appear to be really trustworthy guides towards such a classification, from their being less liable than the other classes to accidental dispersion. [42] _Mémoires concernant l'histoire, &c. des Chinois, par les Missionaires de Pekin_, vol. iv. p. 481. [43] _The Natural History of Pliny_, J. Bostock and H. T. Riley, book viii. chap iv. [44] _The Voyage of the Vega_, A. E. Nordenskjöld. London, 1881. [45] _On the Range of the Mammoth in Space and Time_, by W. B. Dawkins, _Quart. Journ. Geol. Soc._, 1879, p. 138.