Kenyon, The Brain of the Bee. 189 



demonstrated, it may be remembered that very good reasons 

 appear for considering the glomerute as connected with the cells 

 clothing the morula, and from this it is fairly evident that the 

 same cells give rise to the fibers of the tract. A little further 

 evidence will appear in connection with the outer tract. 



TJie Middle Antenno-cerebral Tnict. 



The next tract to be considered is the smallest of the three 

 and arises as a branch of the one just described at a point just 

 above the level of the ventral commissures. It takes an out- 

 ward course behind the mushroom body (fig. 6) and continues 

 upward to the region behind and between the stalks and then 

 bending forward somewhat passes into the outer calyx. 



This seems to be the branch figured by Bellonci as passing 

 outward into the supposed tract between the optic lobes. In 

 several of my bichromate of silver preparations it is very read- 

 ily followed. 



TJie Obiter Antenno-cerebral Tract. 



This tract is of considerable size and originates, as shown 

 in bichromate of silver preparations (fig. 24), from cells above 

 the antennal morula. From the morula it passes backward and 

 outward towards the side of the central brain mass and gradu- 

 ally turning upwards passes behind, but in contact with, the low- 

 er optic commissure (fig. 6) and finally reaches the outer dorsal 

 surface of the fibrillar substance and there, joining the antero-su- 

 perior optic tract, passes in front of the outer stalk into the 

 calyx above. Whether any of its fibers continue to the other 

 calyx or not, I cannot say. 



In some frontal sections there appears to be given off from 

 this tract below the lower optic commissure a small bundle of 

 fibers that curves outward and apparently joins the commissure. 

 But in horizontal sections it seems to follow the commissure to 

 a point near the outer surface of the fibrillar substance, where it 

 turns abruptly forward and enters the mass forming the antero- 

 lateral lower angle of the central cerebral mass. 



