486 
DR. D. FERRIER ON THE BRAIN OE MONKEYS. 
After the brain had been hardened in spirit, it was found that the frontal lobes had 
been removed by a line crossing the anterior extremity of the supero-frontal sulcus on 
both sides. The plane of section sloped somewhat forwards, and the under surface of 
the orbital region remained where it conceals the olfactory tracts and bulbs. The cut 
surface bulged considerably and the edges of the section were softened nearly as far back 
as the antero-parietal sulcus on both sides (see figures 35, 36, 37). The edges were 
raised, and the vessels were injected for some distance posterior to the cut surface. 
Fig. 35. 
Eig. 35 represents by shading the extent of destruction of the frontal and occipital regions in 
Exps. XXIY. & XXV. 
Fig. 36. 
Fig. 37. 
Fig. 36 represents by shading the extent 
of destruction of the right hemisphere in 
Exps. XXIV. & XXY. 
Fig. 37 represents by shading the extent 
of destruction of the left hemisphere in 
Exps. XXIY. & XXY. 
The occipital lobes had been removed almost completely. On the left side the hemi- 
sphere became rounded off just behind the posterior limb of the angular gyrus, which was 
intact. On the right side the posterior limb of the angular gyrus was ragged and torn, 
and formed part of the edge of the plane of section (see fig. 36). 
