xlvi Journal of Comparative Neurology. 



these fibers pass parallel to the tractus lateralis and end in the pyri- 

 form lobe though there are fibers connecting the two tracts. Consid- 

 erable degeneration in the cornu Ammonis (alveus and fascia dentata) 

 indicates a connection between the olfactory lobe and the hippocam- 

 pus via a tract in the septum. [The author's evidence is not quite 

 clear here.] Other fibers degenerate in the cephalic part of the pre- 

 commissure. The author agrees with KoUiker that a part of the pre- 

 commissural fibers end in arborizations about the mitral cells of the 

 tuber, but he finds that a considerable portion consists of fibers orig- 

 inating in the lobe of one side and terminating in the tuber of the 

 other. In this connection it is noted that operations upon embryos 

 (Gudden's method) cause a degeneration of the peripheral part of a 

 tract and an atrophy of the central part, while by Marchi's method 

 only the former is observed. It is therefore possible that the callosum 

 and other commissures do not connect homologous parts as once sup- 

 posed. It would seem to the reviewer that in order to understand 

 the coordination of bilateral functions it is necessary to suppose the 

 connection to be indirect and that this is to be theoretically expected, 

 for the reaction of one centrifugal element upon another similar ele- 

 ment on the opposite would only be possible through a suitable cen- 

 tripetal element. 



A small degenerate portion is found in the pyriform lobe of the 

 uninjured side. The source has not been identified, but the fibers are 

 supposed to cross in the caudal part of the precommissure. A decus- 

 sation of fibers to the hippocampus was also noticed. 



c. L. H. 



Epilepsy.^ 



This volume of 420 pages is composed of lectures delivered this 

 year by Dr. Jules Voisin at the Salpetriere. The work is a general 

 treatise on Epilepsy, particularly in its clinical aspects. After having 

 depicted the epileptic in all his physical and mental modalities, the 

 author treats of the diagnosis, prognosis, pathology, and treatment. 

 A chapter is devoted to the necessary precautionary measures in order 

 to protect the epileptic in society and to protect society against him, 

 and another to the medico-legal aspects. 



That feature which gives to the work a special appropriateness at 

 this time and which will doubtless attract the most general interest is 



1 Dr. Jules Voisin. L'Epilepsie. Parts, 1897. Felix Alcan, editeur. 

 6fr. 



