the Dugong and Manatee, to which it is also allied. [Footnote 109: Published by Mr. Murray, in one vol. 1845. The anatomical description of the fossil Edentata brought home by Mr. Darwin, by Professor Owen, will be found in the "Zoology of the Voyage of the Beagle."] [Footnote 110: Mr. Darwin's Journal, chap. v. p. 81.] The beds containing the above fossil remains, consist of stratified gravel and reddish mud, and stand only from fifteen to twenty feet above the level of high water; hence the elevation of the land has been small since the great quadrupeds wandered over the surrounding plains; and the external features of the country must then have been very nearly the same as now. In another place, Mr. Darwin observes,--"The number of the remains of these large quadrupeds imbedded in the grand estuary deposit which forms the Pampas and covers the granitic rocks of Banda Oriental, must be extraordinarily great. I believe, a straight line drawn in any direction through the Pampas, would cut through some skeleton or bones. Besides those which I found during my short excursions, I heard of many others; and the origin of such names as, 'the stream of the animal,' 'the hill of the giant,' is obvious. At other times, I heard of the marvellous property of certain rivers, which had the power of changing small bones into large; or as some maintained, the bones themselves grew. As far as I am aware, not one of these animals perished, as was formerly supposed, in the marshes or muddy river-beds of the present land, but their bones have been exposed by the streams intersecting the subaqueous deposit, in which they were originally imbedded. We may conclude that the whole area of the Pampas is one wide sepulchre of these extinct gigantic quadrupeds."[111] [Footnote 111: Mr. Darwin's Journal, p. 135. The reader interested in these extraordinary fossil remains should visit the British Museum, and the Hunterian Museum of the Royal College of Surgeons in Lincoln's Inn Fields.]