STRUCTURE OF THE LOBES OF THE CEREBRUM. 



393 



connection (which will be afterwards shown in detail) with the 

 fibrse proprise of the hemisphere, since the latter are exclusively 

 connected with cortical substance. 



The continuity of the surface of the cerebral cortex, which unin- 

 terruptedly covers the nucleus of the amygdala, gives it the deceptive 

 appearance of coalescing with a formation that is quite foreign to it, 

 namely, with the cornu Ammonis, into a single mass, viz., the so- 

 called hook of the gyrus fornicatus. 



THE FORMATION OF THE CORNU AMMONIS. The temporal 

 portion of the gyrus fornicatus, the uncinate convolution or 



Fig. 236. 



Fig. 236. Transparent transverse section from the middle of the 

 length of the cornu Ammonis. Human. Magnified five diameters. 

 8, Subiculum of the cornu Ammonis ; Tar, fascia dentata Tarini ; F, the 

 fimbria ; A , the alveus (Muldenblatt) ; cc, the stratum convolutum, with 

 the large pyramidal bodies ; r, the stratum radiatum ; I, the stratum 

 lacunosum ; m, the nuclear lamina ; rt, substantia reticularis ; arc, 

 stratum of compressed nerve corpuscles in the fascia dentata ; R, 

 cortex of the subiculum. 



.subiculum cornu Ammonis, with the cornu Ammonis, is, accord- 

 ing to the statements made on page 378, a portion of the con- 

 stricting ring of the median surface of the hemispheres, within 

 the lumen of which the cortex terminates by a free border. 



