The evidence upon which these opinions were based had been gathered by such anthropologists as Schmerling, Boucher de Perthes and others, and it had to do chiefly with the finding of implements of human construction associated with the remains of extinct animals in the beds of caves, and with the recovery of similar antiquities from alluvial deposits the great age of which was demonstrated by their depth.
The theory of past migrations from continent to continent, suggested by Cuvier to explain the replacement of the animal life which had become extinct through sudden geologic changes, was prophetic of one of the chief features of modern method - namely, the tracing of migrations.
It may be mentioned, however, that the distribution of these later Tertiary types accords very closely with that of their existing relatives; the families of South American hystricoids being represented by a number of extinct genera in the formations of Argentina and Brazil.
In 1864 Don Manuel Orozco y Berra found no fewer than 51 distinct languages and 69 dialects among the Indian inhabitants of Mexico, to which he added 62 extinct idioms - making a total of 182 idioms, each representing a.
C. Marsh, Odontornithes: A monograph of the Extinct Toothed Birds of North America (New Haven, Conn., 1880); R.
At the same time the then existing alpine floras descended to lower levels, though we may agree with Ball that they did not necessarily become extinct at higher ones as long as any land-surface remained uncovered by ice.
Wheeler, Report upon United States Geographical Surveys West of the One Hundredth Meridian (Engineer Department, U.S. Army); Israel C. Russell, Present and Extinct Lakes of Nevada, in National Geographic Monographs, vol.
In this paper he made public the results of his discoveries in the cave of Aurignac, where evidence existed of the contemporaneous existence of man and extinct mammals.
The anatomical structure of the vegetative organs of recent cycads is of special interest as affording important evidence of relationship with extinct types, and with other groups of recent plants.
The First Church, Charleston, which had become almost extinct through Arminianism in 1746, entered upon a career of remarkable prosperity in 1749 under the leadership of Oliver Hart (1723-1795), formerly of the Philadelphia Association.