THE EVOLUTION OF THE ELEPHANT 



ment of human thought, and as a scheme of creation is 

 immeasurably more reasonable than its crude predecessors. 

 So far from belittling our conceptions of a Supreme Intelli- 

 gence, it adds immensely to tfie dignity and wonder of the 

 universe. 



REFERENCES 



Horses 



M'^.TTHEW, W. D. and Chubb, C. H. Evolution and Domestication 



of the Horse. Guide Leaflet of the American Museum, No. 



36, 1924. 

 LooMis, F. B. The Evolution of the Horse. 1926. Marshall Jones 



Co. 

 OsBORN, H. F. Equidae of the Oligocene, Miocene and Pliocene 



of North America. Mem. Amer. Museum Nat. Hist., new series. 



Vol. II, 1918. 

 Antonius, O. Stammesgeschichte der Haustiere. 1922. 



Elephants 



OsBORN, H. F. The Elephants and Mastodons Arrive in America. 



Jour. Am. Mus. Natural History, Vol. XXV, No. 1, pp. 3-23, 



1925. 

 OsBORN, H. F. Phylogeny and Classification of Elephants. Amer. 



Phil. Soc. Proc, Vol. LXIV, pp. 17-35, 1925. 

 Guide to the Elephants in the British Museum, 1922. 



The remains and the impressions of ancient animals and plants found 

 in the rocks — the fossils discovered by our geologists — show a gradual 

 multiplication of species from age to age, and a gradual increase in the 

 complexity of forms and functions. The story told by the record of the 

 rocks is a story of progress from the simple to the complex, from the 

 lower to the higher. The earliest true vertebrates were the simplest 

 fishes; next came the higher, more complex fishes; then the amphibians, 

 able to live both in water and on land. The reptiles, such as lizards and 

 crocodiles, came next; then birds, which, as the record shows, were 

 derived from the reptiles; and the mammals, some of them, such as the 

 apes and man, of very recent origin. The geologic record reveals strikingly 

 the great story of evolution, and discovery after discovery is making the 

 details of that record more clear and more convincing. — Editor. 



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