158 ANATOMY OF THE CENTBAL NBRVOTJS SYSTEM. 



Of the physiological significance of the corpus striatum we know 

 nothing at all. All experiments carried out on the brains of fishes have only 

 induced disturbance of the sense of smell when the anterior lobes were 

 severed. Up to the present no animal from which the striata alone had been 

 removed has been observed for any considerable time. This operation seems 

 to be possible only in the teleosts, where there is no mantle to complicate 

 the operation. 



Even for the olfactory apparatus, experiments which throw light upon 

 it are few. It has become possible only through the experiments of the 

 last years to give it the anatomical dignity of separating it into different 

 territories. Probably the comparative observation of animals with a cortical 

 olfactory apparatus and animals without it will lead to the desired results. 



The questions are: Do fishes smell in the same manner as do the higher 

 vertebrates? Do they interpret their olfactory impressions differently? 

 Are they able to retain these impressions in their memory? 



