LIFE'S DAWN ON EARTH 



BEING THE 



AND 



THEIR RELATIONS TO GEOLOGICAL TIME 



AND TO THE DEVELOPMENT OF 



THE ANIMAL KINGDOM. 



BT 



J. W. DAWSON, LL.D., F.R.S., F.G.S., ETC., 



PRINCIPAL AND~"VlCE-CHANCELLOR OF M'GILL UNIVERSITY, MONTREAL 



AUTHOR OF 

 "ARCHAIA," "ACADIAN GEOLOGY," "THE STORY OF 



THE EARTH AND MAN," ETC. 



SECOND THOUSAND. 



LONDON : 



HODDER & STOUGHTON, 

 27, PATERNOSTER ROW. 



MDCCGLXXV. 





