THE BRAIN. 



491 



The Connection of one Fart of the Brain with another. — 

 Though it has long been known that the different parts of the 



Fig. 3B1. — Lateral views of the brains of a rabbit, a pig, and a chimpanzee, drawn of 

 nearly the same absolute size (Huxley). The rabbit's brain ie at the top; the pig's, 

 in the middle; the chimpanzee's, lowest. (?^, olfactory lobe; ^. frontal lobe; B, 

 occipital lobe; G, temporal lobe; Sy, the sylvian fissure; In, the insula; S. Or, 

 supra-orbital; 8.F, M.F, I.F, superior, middle, and inferior frontal gyri; A.P, 

 antero-parietal; P. P, postero-parietal gyri; ij, sulcus of Rolando; P. Pi, postero- 

 parietal lobule; 0. Pf, external perpendicular or occipito-temporal sulcus: An, 

 angular gyrus; 2, 3, 4, annectent g^i; A. T, M. T, P. T, the three temporal, and 

 S. Oc, M. Oc, I. Oc, the three occipital gyri. 



