SUMMARY OF ' PHILOSOPHIE 200LOGIQUE: 261 



CHAPTEE XVII. 



SUMMARY OF THE 'PHILOSOPHIE ZOOLOGIQUE.' 



THE first part of the * Philosophic Zoologiqiie ' is the one 

 which deals with the doctrine of evolution or descent 

 with modification. It is to this, therefore, that our 

 attention will be confined. Yet only a comparatively 

 small part of the three hundred and fifty pages which 

 constitute Lamarck's first part are devoted to setting 

 forth the reasons which led him to arrive at his con- 

 clusionsthe greater part of the volume being occu- 

 pied with the classification of animals, which we may 

 again omit, as foreign to our purpose. 



I shall condense whenever I can, but I do not think 

 the reader will find that I have left out much that 

 bears upon the argument. I shall also use inverted 

 commas while translating with such freedom as to 

 omit several lines together, where 1 can do so without 

 suppressing anything essential to the elucidation of 

 Lamarck's meaning. I shall, however, throughout refer 

 the reader to the page of the original work from which 

 I am translating. 



" The common origin of bodily and mental phe- 

 nomena," says Lamarck in his preliminary chapter, 

 "has been obscured, because we have studied them 



