DR. J. MURIE ON THE ANATOMY OF THE SEA-LION. 



577 



Fig. 41. Reduced sketch of a posterior segment of the inner face of the right cerebrum, 

 designed to show the hippocampal sulci. 



Fig. 42. An outline representing the same Sea-lion's brain, as seen in front or fore- 

 shortened. Taken from a cast of the interior cavity of the skull, with the 

 dura mater in place. 



Fig. 43. Posterior or occipital view of same. Both very much reduced. 



The same lettering corresponds in all the figures of this Plate. 



F. Frontal. 

 P. Parietal. 



10. Internal orbital. 

 MO. Mid orbital. 

 EO. External orbital. 

 IF. Inferofrontal. 

 MF. Mid frontal. 

 SF. Superofrontal. 

 Cr. Crucial. 

 AP. Anteroparietal ( = 



dant). 

 PP. Posteroparietal ( = 



dant). 

 SM. Supramarginal. 

 Ang. Angular. 

 AT. Anterotemporal (- 

 M.T. Mid temporal. 



Cerebral Lobes. 



T. Temporal. 

 0. Occipital. 



Convolutions. 



PT. Posttemporal. 



Occipital (inferior). 



premier pli ascen- 

 : second pli ascen- 



=inframarginal). 



Oc. 



Lob 1 



Lob 2 



Lob 3 



Lob* 



Lob 5 



Lob 6 



Lobule of anteroparietal. 

 Lobule of postparietal. 

 Lobule of supramarginal. 

 Lobule of angular. 



Lobule of posttemporal. 



Lobule of internal occipital. 

 * Fold connecting internal occipital with 



quadrilateral lobule. 

 Ma. Great marginal. 

 Ca. Callosal. 

 CI. Callosal lobule. 

 Ql. Quadrilateral. 

 U. Uncinate. 



Fissures and Sulci. 



io. Intorbital. 



mo. Mid orbital. 



eo. Extorbital. 



cs. Crucial. 



ap. Anteroparietal. 



ro. Rolando. 



ipa. Intraparietal. 



sy 1 . Sylvian (antero-vertical). 



sy 2 . Sylvian (postoblique). 



at. Anterior temporal ( = parallel). 



mt. Mid temporal. 



ot. Occipitotemporal ( = posttemporal). 



ep. External perpendicular (faint line 



pointing to front one). 

 ip. Internal perpendicular. 

 cm. Calloso-marginal. 

 co. Colateral. 

 calc. Calcarine. 

 dent. Dentate. 



