(V 207 ) 
recognisable by the loss of the superior half of the inner granular 
layer, which is characteristic of the calcarina, and which gives place 
to a row of large pyramidal cells. The line of Vicq d’Azir at the 
same time is wanting. 
So we find *a human type in the structure of the occipital lobe 
the surface of which reminds us much more of the anthropoid brain. 
EXPLANATION OF THE FIGURES. 
The drawings have been made natural size by Martin’s dioptrograph, and 
reduced to 2 / 3 . 
Fig. 1. Dorsal aspect of the hemispheres. 
c = fiss. centralis. On the right side nearly rectilinear, on the left side showing 
two frontal convexities 
Between the third and fourth quarter a side-branch proceeds on both 
sides in a frontal direction. On the left side there seem to be two in the 
horizontal projection. The lateral limit however of the small square, 
which has been drawn as a furrow, is really a shallow fold in the lateral 
wall of the said side branch of which latter the mesial wall is made 
discontinuous by the confluence with the fissure parallel to c which has 
moreover “pulled mediad” the mesial wall of the same side branch. The 
widening is accompanied by a dislocation of the sulcus-bottom laterad, 
which produces the obliquity of the lateral wall, on which latter appears 
the mentioned shallow fold. — The whole makes a somewhat pathological 
impression. The part of it, that is parallel to c seems to be the only 
remnant of the fissura praecentralis. 
pr == fiss. praecentralis (on the right side). The part that corresponds to the 
fiss. praec. inferior is continuous with the sulc. opercularis (fig. 3). 
fi = fiss. frontalis superior, broken on both sides. 
fz = fiss. frontalis medius. 
rc — fiss. retrocentralis. On the left side it shows a posterior convexity appa¬ 
rently caused by the mesial part being bent in a frontal direction, in¬ 
consequence of the encroachment on the convexity of the 
cm = fiss. calloso-marginalis, which on the right side appears on the convexity 
- in a more caudal region. 
ip = fiss. interparietalis, on the left side it shows in contrast, with the right 
a continuation with r.c.\ on the left side it is broken. It is continuous with; 
a —simian fissure (see text). 
p-o l = fiss. parieto-occipitalis lateralis appearing on the convexity. On the 
right side it is continuous with i-pi. 
h fiss. temporalis superior. . 
Figure 2. Lateral wall of the left hemisphere.- 
Figure 3. Lateral wall of the right hemisphere. 
S = fiss. Sylvii (see text'. . 
The furrows of the insula are dotted. 
«, (3 — sulc. opercularis (see text). - 
/ = direct .continuation from, cortex to insula (see text). 
h = fiss. temporalis media)' only visible on the right henfisphere. 
