ANIMAL PSYCHOLOGY IN FRANCE 455 



motor memory and sensory memory, and considers muscular 

 memory to be involved in the return of insects to the nest. In 

 the second part of the book the author discusses the aspects and 

 limits of human memory, what its disturbances consist in and 

 what its progress may be. He attempts to prove that man is 

 not a creature essentially different from the animals, an opinion 

 which seems to be still quite common in philosophic circles. 



