140 THE GENERAL ANATOMY OF THE CERCOPITHECIDAE [SECT. A 



CENTHAL SULCUS 



ARCUATE SULCUS 



SULCUS RECTUS 



ORBITAL SULCUS -- 



FISSURE Of SYLVIUS 



INTRAPARIETAL SULCUS 



SULCUS LUNATUS 



TEMPORALIS SUPERIOR 

 SULCUS 



COMPENSATORY SULCUS 



PARIETO-OCCIPITAL 

 FOSSA 



RETRO-CALCARINE 

 SULCUS 



COLLATERAL SULCUS 



CINGULI 



SULCUS 



SULCUS 

 GENUALI9 



INCISURA TEMPORALIS OR 

 RHINAL FISSURE 



HIPPOCAMPAL FISSURE 



Fig. 84. The left cerebral hemisphere of a Semnopithecus monkey (Cercopithe- 

 cidae). The main features are similar to those of the human brain: on the mesial 

 aspect the small post-splenial gyrus A. Retzii is not visible, and the fascia dentata 

 has not been exposed. 



