Page:Natural History Review (1861).djvu/229

iii. The absence of the second pli de passage is well seen on both sides of the brain; and the wave-like anterior edge of the occipital lobes constituting the "operculum" is especially well marked on the right side.

Fig. 4. Brain of orang dissected, so as to show the lateral ventricle of the right side, its three cornua and the hippocampus minor, 19. It shows, besides, the different relations which the bourrelet of the corpus callosum holds in the ape and in man:—

i. To the commencement of the third cornu, 18.
ii. To the internal perpendicular fissure, 16.

iii. To the hemispheres which it connects.

1. Inferior frontal convolution.—"Étage frontal inférieur" of Gratiolet.

2. Middle frontal.—"Étage frontal moyen."

3. Superior frontal.—"Étage frontal supérieur."

4. Eirst ascending parietal.—"Premier pli ascendant."

5. Second ascending parietal.—"Deuxième pli ascendant."

5'. Lobule of second ascending parietel.—"Lobule du deuxième pli ascendant."

6 and 6'. Convolution running below, and parallel with the lower lip of the Sylvian fissure.—"Pli courbe."

7. Lower lip of Sylvian fissure.—"Pli marginal inférieur."

10. Superior occipital convolution.—"Étage superieur du lobe occipital."

11. Middle occipital convolution.—"Étage moyen."

12. Inferior occipital convolution.—"Étage inférieur."

13. Corpus striatum.

14. Posterior edge of corpus callosum.

15. Fornix.

16. Internal occipital fissure.

17. "Scissure des hippocampes."

18. Third cornu of lateral ventricle.

19. Hippocampus minor;
a. Anterior lobes.
b. Middle temporo-sphenoidal lobe.
c. Cerebellum.
d. Occipital lobes.
e. Medulla oblongata.
f. Fissure of Sylvius.
g. Pons.

a. Convolution connecting the superior occipital convolution (10), to the lobule of the 2nd ascending parietal 5'.