Kenyon, The Brain of the Bee. 20 1 



central body to the median anterior mass of fibrillar substance 

 (fiber 49). 



XVI. Above these and in front of the arch is a small 

 group of cells, often staining more deeply than those surround- 

 ing them, whose processes pass directly downwards outside of 

 the tract just described and appear to enter the inner antenno- 

 cerebral tract (fiber 3), 



XVII. Above the ends of the fibrillar arch is a large 

 group of cells of large size whose fibers form a dorso-ventrally 

 flattened band that passes forwards outside of the inner antenno- 

 cerebral tract and above the superior commissure (figs. 2, 7, 8) 

 and bending about the inner stalk distribute themselves in the 

 fibrillar substance above and outside of the anterior root of the 

 mushroom bodies (fiber 23). 



XVIII. Below the fibrillar arch and a little below the 

 commissure of the central body is a loose group of cells whose 

 processes in some cases appear to pass into the superior optic 

 commissure. In others they pass across to the fibrillar mass 

 behind the base of the junction of the roots and stalks of the 

 mushroom bodies (fiber 4). 



XIX. Behind group XVI and separated from it by the 

 fibrillar arch is one that appears to send its processes down- 

 ward into the inner antenno-cerebral tract, but probably they 

 are sent into the central body. 



XX. Another group below these and the fibrillar arch 

 sends its processes downward and inward apparently under the 

 superior optic commissure, in front of which they bend upwards 

 and apparently pass to the calices along with the fibers of the 

 superior commissure and those of the inner antenno-cerebral 

 tract. 



XXI. The cells about the antennal morula are most nu- 

 merous in the space between it and the rest of the brain, although 

 they cover almost its entire surface, and are perhaps gathered 

 into as many groups as there are inter-glomerular spaces. One 

 group that should have been noted before is situated in the in- 

 ner superior side of the neck of the morula and sends its fibers 

 upward through the anterior portion of the central mass of 



