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Dr. Cunningham—Surface Anatomy of the Primate Cerebrum. 243

13. The ramus occipitalis was connected with the ramus horizontalis in
63'7 per cent, of the adult human hemispheres examined.

14. The union between these two segments of the sulcus, as Ecker
and Wilder have shown, is much more common on the left side than on the
right side.

15. The sulcus occipitalis transversus of Ecker is not the homologue
of the " Affenspalte " in the apes, but merely a terminal bifurcation of the
ramus occipitalis.

16. This view of the sulcus transversus occipitalis is borne out not only
by the phylogenetic but also by the ontogenetic evidence at our disposal
(vide from p. 220 to p. 234).

17. Eberstaller's views in regard to the preponderance of the inferior
parietal lobule in the human brain are apparently correct.

18. The presence of deep annectant gyri in the course of the sagittal
part of the intraparietal sulcus are not characteristic of man alone. They
may be seen in the brain of the chimpanzee, and occasionally also in the
brain of the baboon.

19. In the adult brain the relative size of the first parietooccipital
annectant gyrus is not appreciably different in the two sexes.

20. This gyrus is, however, relatively more bulky in the anthropoid
ape than in man.

21. The obliquity of the sagittal portion of the intraparietal sulcus is
more marked in the male than in the female.

22. In the anthropoid apes the sagittal part of the sulcus assumes a
more sagittal direction than in man.

23. The relative length of the sagittal portion of the sulcus is greater in
the human foetus than in the adult.

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