who so widely surpass and rule them. We think that we- 

 shall better promote civilisation if we show that man is the 

 last step of an advancing progress, than if we isolate him in 

 the universe and leave him to rule a world bare of intelli- 

 gence and of emotion." Equally well does the same author 

 speak in another place, wherein he argues against those who- 

 above all things will not admit any comparison between the 

 intellectual powers of men and beasts : " It is clear 

 that we can only comprehend an intelligence, of whatever 

 kind it may be, 'when we can find its analogue in our own 

 intellectual life. This is a necessity of Animal Psychology 

 to which we must absolutely hold fast." 



The promises made by the author at the close of the pre- 

 face of the first edition have been partly redeemed by the 

 issue, by M. A. Hofman, of Berlin, of the work on " Love 

 and love habits of the Animal World," as one of the pub- 

 lications of the " Universal Society of German Literature." 

 The author further hopes that he may have time and oppor- 

 tunity to fulfil the remaining part of his promise before 

 very long. It will doubtless interest readers of this volume 

 to hear that a Dutch translation has appeared under the 

 title of " Uit het Leven der Dieren, vertaald door R. E. 

 de Haan " (Nimwegen, published by Bloomert and Tim- 

 merman), and that a French translation of this third edition 

 will shortly be issued in Paris by Reinwald. 



Darmstadt, March, 1880. 



