M. G. Schlapp 281 
Fic. 12. Showing the transition from the seven-layer type to the visual 
area, or eight-layer type in man. 
7. T.—Seven-layer type. 
8. T.—Eight-layer type, or visual region. 
The layers are the same as in the monkey. Here one can see 
the solitary cells in the inner stripe of Baillarger. 
Fie. 18. Frontal section through the lateral geniculate body of the dog, 
simple and slightly differentiated. The same in the cat. 
Fig. 14. Frontal section through the lateral geniculate body of the monkey, 
very much more differentiated than that of Fig. 14. The lateral 
geniculate body in man has the same appearance as in the 
monkey. 
DESCRIPTION OF PLATE IV. 
Horizontal section through the hemisphere of the brain of the monkey, 
(Macacus cynomolgus). 
C. F., Central Sulcus (Fissure of Rolando). 
I. P. F., Interparietal Sulcus. 
P. O. F., Parieto-occipital fissure. 
C., Calearine fissure. 
In front of the central suleus, is the motor area; behind the central 
suleus, up to the parieto-occipital fissure, is the region of the seven-layer 
type; behind the parieto-occipital fissure is the region of the eight-layer 
type, or visual cortex. 
