Fig. 27. THE INNER SURFACES OF THE CEREBRAL HEMISPHERES. (Same brain 

 as No. 23 ) i, Callosomarginal fissure. 2, Fissure of Rolando terminating in the longi- 

 tudinal fissure. 3, Subparietal sulcus. 4, Parieto-occipital fissure. 5, 5, Calcarine fis- 

 sure. 6, Fissure of the corpus callosum. 7, Collateral sulcus. 8, Dentate fissure. 9, 

 Fissure of Sylvius. Convolutions a, Marginal, b, Paracentral. c, Quadrate, d, 

 Cuneate. e, Ungulate f, f, g, Falciform lobe divided into two (some make three) 

 divisions. /, /, Gyrus fornicatus. (Under the splenium of the corpus callosum is the 

 isthmus or the gyrus hippocampi), g, Gyrus uncinatus. h, Genu. /, Body, and J, 

 Splenium of the corpus callosum. k, Optic thalamus. The crura cerebri are divided 

 close under the optic thalami. 



