474 



the fascia dentata further back, fine medullated fibres may be seen 

 entering the molecular layer from the fimbria. In all probability these 

 are the same series of fibres. If this be so the cells of the fascia 

 dentata are olfactory "receptive" cells and, as such, are to be grouped 

 with the cells of the precommissural area as an intermediate station 

 between the olfactory lobe and the hippocampus; the fine axis cy- 

 linder processes (h) of the granular cells conducting the impulse to 

 the pyramidal cells of the hippocampus (k) so that it reaches the 

 same destination as it would by the other route. If these facts be 

 true, the protoplasmic processes of the cells of the fascia dentata, 

 form an other example of the "receptive" function of such processes, 

 as advanced in the case of the "mitral cells" among others , by Ra- 

 mon T Cajal (Croonian Lecture, Proc. Roy. Soc. London, Vol. LV, 

 No. 344). 



In placental mammals it is probable that this "olfactory bundle 

 of the fascia dentata" runs backwards to the fascia dentata in the 

 striae Lancisii. But concerning this point and many other interesting 

 points touched upon in this paper, I hope to be able to speak more 

 definitely in a short time. It is sufficient at present to state that the 

 fascia dentata seems to be a very highly differentiated "receptive" 

 station for olfactory impulses and as such varies directly with the 

 size of the olfactory lobe. 



Sydney, December 1894. 



Nachdruck verboten. 



Zur Homologie der Fomixcommissur und des Septum lucidum 

 bei den Reptilien und Säugern. 



Von Adolf Mkyek, Docent für Neurologie, Universität Chicago. 



Die jüngst von Prof. Rabl - Rückhard veröfientlichte Be- 

 schreibung des Gehirns der Riesenschlange ' ) beschäftigt sich in 

 einigen kurzen Bemerkungen mit den Faserzügen, die in der Lamina 

 terminalis verlaufen und für die Homologiefrage der medialen Wand 

 des Hemisphärenhirns von großer Wichtigkeit sind. Seit der Ver- 

 öffentlichung meiner Arbeit über das Vorderhirn einiger Reptilien ^) 



1) Zeitschrift f. wiss. Zoologie, Bd. 58, Heft 4. 



2) Zeitschrift f. wiss. Zoologie, Bd. 55. 



