[34] In Tennant's "List of Brit. Fossils" (1847), but two species--a Brachiopod and a Gastropod--are mentioned as common to the Chalk and the London Clay. They are _Terebratula striatula_, and _Pyrula Smithii_. [35] Ansted's Anc. World, 267. [36] Reliquiae Diluvianae. [37] Travels through the Alps, p. 19. [38] Prof. Owen, in his admirable account of the _Mylodon_, has mentioned a fact which brings us very vividly into contact with its personal history. He shows that the animal got its living by overturning vast trees, doing the work by main strength, and feeding on the leaves. The fall of the tree might occasionally put the animal in peril; and in the specimen examined there is proof of such danger having been incurred. The skull had undergone two fractures during the life of the animal, one of which was entirely healed, and the other partially. The former exhibits the outer tables of bone broken by a fracture four inches long, near the orbit. The other is more extensive, and behind, being five inches long, and three broad, and over the brain. The inner plate had in both these cases defended the brain from any serious injury, and the animal seems to have been recovering from the latter accident at the time of its death. [39] Naturalist's Voyage, _passim_. [40] The Indians of North America knew that the Mastodon had a trunk; a fact which (though the anatomist infers it from the bones of the skull) it is difficult to imagine them to be acquainted with, except by tradition from those who had seen the living animal. [41] Ansted; Phys. Geography, 82.