THE BRAIN OF THE BEE 



A PRELIMINARY CONTRIBUTION TO THE MORPHOLOGY OF THE 

 NERVOUS SYSTEM OF THE ARTHROPODA. 



By F. C. Kenyon, Ph.D., 



Fellow in Biology, Clark University, Worcester, Mass. 



CONTENTS. 



Introduction. 



Materials. 

 Methods. 



General description. 



External appearance. 

 Cerebral nerves. 

 General internal structure. 

 Types of nerve cells. 

 Connection between nerve fibers. 

 Trache.^!. 



Special description, the Proto-cerebron. 



The mushroom bodies. 



The calyx-cup. 



The stalks of the mushroom bodies. 



The roots of the mushroom bodies. 

 Minute Structure of the mushroom bodies. 



Fibers ending in the calyx. 



Fibers ending in the stalks and roots. 

 The function of the nerve cells of the mushroom bodies. 

 The central body. 

 The tubercles of the central body. 

 The fibrillar arch. 

 The association fibers of the proto-cerebron. 



The Deuto.cerebron. 



The antennal lobe. 



The root of the antenno-sensory nerve. 



The root of the antenno-motor nerves, 



