Ken YON, The Brain of the Bee. 155 



the first that were fairly well impregnated, but not so well as 

 later ones, and is far from showing the richness of branching 

 seen in the latter. Further, the branches are delicate and the 

 smaller ones covered with fine short processes that give the 

 whole a more or less feathery appearance. The preparation is 

 not black, but of a delicate reddish brown tint. The difficulty 

 of representing them and the fact that the connections with the 

 cell bodies are poorly represented in the other preparations 

 caused me to be satisfied with the figure given. 



The processes of the smaller cells forming the pyramidal 

 central heap, as shown in the same figure (fig. 18, PI. XXI), 

 also pass into and branch in the fibrillar calyx-cup. These 

 branches resemble those of the other fibers, but, as shown, are 

 far less numerous. Moreover the processes from the cells may 

 be slightly smaller. 



As shown in the figure, the processes do not always follow 

 the most direct line to the fibrillar substance, but seem often to 

 bend about the intervening cell-bodies. Consequently little de- 

 pendence can be placed upon even the best of preparations by 

 ordinary methods for tracing fibers for any considerable distance 

 from the cell body towards the fibrillar substance. Fibers may 

 readily be seen, however, passing from the cellular mass into 

 the calyx, for between the two there is a narrow space but 

 loosely filled with fibers, which may be seen more or less indis- 

 tinctly in the photographs. 



In this space are to be seen small round deeply stained 

 bodies, which upon close examination and by comparison with 

 sections cut in a plane parallel to the inner walls or to the base of 

 the calyx are seen to be composed of a large number of very fine 

 fibers arranged parallel to one another and forming thus a close- 

 ly crowded fiber tract. These radiate in all directions from the 

 place of union of the calyx and the stalk from which they seem 

 to come. Outwardly the fibers separate and gradually spread 

 out over the whole inner surface of the cup. Such phenomena 

 are best shown in bichromate of silver preparations, but may be 

 seen in preparations by ordinary methods and have been fig- 

 ured by earlier writers (Viallanes, Cuccati). 



