Edinger, Comparative Psychology. 



447 



Hungry animals if they possess only the palaeencephalon seize 

 food under all circumstances, provided the stimuli which proceed 

 from it are appropriate, but only then. An animal which is 

 incited to seizing only by a moving body never recognizes the 



Selachian. 



Amphibian. 



Reptile. 



Mammal. 



Fig. 3. The evolution of the neencephalon (black) and the regression of the palaeencephalon (gray). 



same body if it is at rest. All of these animals can be caught with 

 bait if one has ascertained the proper stimulus. Fishes which, 

 like the trout, go toward swiftly moving and glittering insects can 

 easily be caught by imitations of such insects constructed of metal 



