Kenyon, TJie Brain of the Bee. 205 



In the ventro-cerebron of the bee there is recognizable but 

 one root to each of the oral nerves. Of these that of the max- 

 illary nerve is most prominently, and that of the mandibular 

 nerve the most meagerly, developed. The roots connect with 

 the ventral column as described by Binet (94) for one of the 

 branches of the double root recognizable in the Coleoptera. 



Motor cells have been found in a ventral position in the 

 ventro-cerebron, which does not accord with the distinction, 

 based upon physiological experiments by Faivre (57) and Binet 

 (}>4) of a dorsal motor and a ventral sensory area for each gan- 

 glion of the ventral cord. This is reconciled by pointing out 

 that it is the fibrillar connections that are destroyed in the le- 

 sions produced dorsally, and the association cells and fibres and 

 the terminations of sensory fibers in ventral lesions. If exper- 

 iments be performed destroying individual cells and thus pro- 

 ducing a consequent degeneration of their individual fibers, it 

 will probably be found that the ventral surface of a ganglion 

 may be described as a motor area. 



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