i6o Journal of Comparative Neurology. 



of the root. In the inner root also similar bands, though less 

 conspicuous, are found, but there instead of being transverse, 

 they are longitudinal. 



The fibers just described are more or less coarse, consider- 

 ably more so than fibers entering the lower outer side of the 

 root behind them (fig. 28). The sub-branches of the second 

 kind of entering fiber also take an upward course and break up 

 into a series of branchlets, which do not, however, form a com- 

 pact bushy head. Where their cells of origin are situated I am 

 unable to say further than that subsequent studies will probably 

 show them to be situated somewhere beneath the calyx-cups, 

 either to one side of or behind the stalks. Their outward-go- 

 ing branches seem to penetrate into the lower lateral depths of 

 the brain. A third fiber enters this same region at a lower 

 level and appears to come from the lower lateral side (fig. 28). 



Behind these fibers near the junction of the roots, or in the 

 plane shown in fig. i, PI. XIV, on the left, fibers are found 

 entering on the lower inner side which present a more delicate 

 appearance and are otherwise different from those first described 

 (fig. 28). They branch more or less dichotomously and end in 

 a tuft of branchlets which in preparations with osmic acid or 

 haematoxylin give rise to the broken appearance shown in the 

 section of the left root in fig. i, a comparison with which will 

 show that fig. 28 is not properly oriented and that it should be 

 viewed from the corner of the plate so as to make the branches 

 crossing the dotted ring take a nearly horizontal course. 



In the region of the junction of the two roots and the two 

 stalks rather coarse fibers are found (fig. 17) considerably resem- 

 bling those first described, whose more or less bushy terminals 

 along with those last described produced the knotted appear- 

 ance described by Rabl-Riickhard ( 76) for the ant as " 2-3 

 small clefts rounded off above," and the lenticular spots only 

 faintly shown in fig. 2. The same appearance as that described 

 by Rabl-Riickhard is found in the bases of the stalks in the bee, 

 but the section represented in fig. 2 is too far back to show it. 

 To imagine the figure, however, all that is necessary is to sup- 

 pose the lenticular spots to be larger and united at their bases. 



