2 Permanence and Evolution. 



only identity, subsequent investigators saw unity 

 in diversity. It was soon found out that where 

 Linnaeus only saw the pheasant there were 

 many permanent types of pheasant, and gradually 

 it was doubted if all domestic animals bearing 

 the same name originated from one stock, and 

 the same doubt was extended to the races of 

 man. 



At first these doubts only attached them- 

 selves to the better marked breeds of domestic 

 animals and the principal races of men, but 

 the authors of " Types of Mankind " saw 

 that, e.g., the fair and dark races of Europe 

 were equally permanent with the Negro or the 

 Hottentot, and Agassiz maintained that men 

 were created in nations. 



Meanwhile these views were partially applied 

 by Broca (articles in " Journal de la Physiologic 

 de 1'Homme et des Animaux "), Brent (" Pigeon 

 Book," &c.), from the point of view of a prac- 

 tical breeder, and the Rev. T. Dixon (" Orna- 



