530 PHRENOLOGY: OLD AND NEW. 



which ohtains between the Brain of these animals and 

 that of Man. Such experiments have been made with 

 much skill and judgment by Dr. Terrier,* to whose 

 writings the reader must be referred for full details as 

 to his numerous observations, and the validity of the tests 

 adopted. Here there is space only for a brief enunciation 

 of the results and conclusions at which he has arrived. 



TSL 



Fig. 172.— Left Hemi^^phere of the Brain of a Monkey (Macacu.'<\ A, fissure 

 of Sylvius ; B, fissure of Rolando ; C, Parieto-occipital, or, perpendicular fissure ; 

 F L, Frontal Lobe ; P L, Parietal Lobe ; O L, Occipital Lobe ; T S L, Temporal Lobe ; 

 F, upper, F2, middle, F3, lower Frontal Convolution; sf, supero-frontal Sulcus; 

 if, infero-frontal Sulcus ; ap, antero-parietal Sulcus ; AF, xVscending Frontal, and AP, 

 Ascending Parietal Convolution ; P P L, Postero-Parietal Lobule ; A G, Angular 

 gyrus; i]^, intra-parietal Sulcus; T, T2, T3, Upper, Middle, and Lower Temporal 

 Convolutions ; ti. <2, Upper and Lower Temporal Sulci; Oi, O2, O3, Upper, Middle, and 

 Lower Occipital Convolutions ; 01, 02, first and second Occipital Fissures. (Ferrier.) 



These experiments of Ferrier are supposed by him to 

 support the notion that' perceptive centres ' limited in area, 

 and topographically distinct from one another, exist in the 

 cortex of the Cerebral Hemispheres. His facts, however, 

 do not necessarily carry with them any such interpretation. 

 They are quite capable of being explained in accordance 



* See " Philos. Trans. 1875," Pt. II., and '' The Functions of the 

 Brain," 1877, chap. ix. 



