Kenyon, The Brain of the Bee. 171 



stance and send branches back into the central body. Others 

 bend over the inner roots and send branches upwards and across 

 to the region immediately above the base of the anterior root of 

 the opposite side (fig. 32, and fiber 50, Pi. XVIII). Another 

 seems to arrive, (whether from over the top of the central body 

 or from somewhere beneath the calyx-cup, is difficult to decide,) 

 and branches near the junction of the two roots, one branch 

 going toward the central body, the other straight downward 

 (fiber 21, PI. XVII). A similarly perpendicular fiber is also 

 found on the outer side of the root (fiber 20, PI. XVII). Still 

 another (fig. 32) seems to arise as a small fiber from over the 

 central body, passes downward to the opposite side, where it 

 becomes much enlarged, and gives off numerous branches, these 

 even passing out under the anterior root. It may possibly be 

 one of a group of fibers (fiber 49, PI. XVIII) originating from 

 a group of cells near the fibrillar arch and passing directly for- 

 wards over the central body. 



A horizontal fiber (fig. 22, PI. XXI) originates somewhere 

 at the side of the brain and after giving off several branches 

 that spread out over the top of the anterior root ends in an ar- 

 borescent system of fine branchlets in the upper part of the 

 middle portion of the cerebron just across the root. 



The fibers connecting the anterior and posterior region are 

 most striking in appearance and are of considerable extent. 

 One (fig. 30) apparently originates from cells in the region 

 above and behind the antennal lobe and passes backward to one 

 side of the median plane giving off a branch that subdivides 

 and passes to the median anterior root, one passing up close to 

 it and the other to a lower level. After giving off this branch 

 it becomes very much smaller and passes on backwards, giving 

 off several small branches meanwhile. Near the posterior 

 wall it divides into two branches of small size, but of consider- 

 able length, the one going directly upward and branching 

 among the ocellar glomerulae, the other directly downward into 

 the oesophageal commissure and the ventrocerebron. 



Another fibre (48) equally, if not more peculiar, is shown 

 in figure 34. This appears to originate from a cell situated 



