EVOLUTION OF THE VERTEBRATES 163 



REFERENCES 



Von ZitteLj K. A., Textbook of Palaeontology, translated by Eastman, C. R., 



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 Patten, W., The Evolution of the Vertebrates and Their Kin, 1912. 

 Scott, W. B., A History of Land Mammals in the Western Hemisphere, 1913. 

 Lull, R. S., Organic Evolution, 1917. 



Lull, R. S., (editor) Evolution of the Earth and Its Inhabitants, 1918. 

 OsBORN, H. F., The Origin and Evolution of Life, 1918. 

 Newman, H. H., Vertebrate Zoology, 1920. 



