60 



Prof. G-. Elliot Smith. The MorpJwhgy of [Dec. 1, 



previous work I have suggested the name " retrocalcarinus."* In that 

 memoir I have emphasised the fundamental distinction between the 

 calcarine and the retrocalcarine sulci and have discarded the customary 



Fig. 1. — Diagram of tlie Mesial Aspect of the Occipital Kegion of the Eight 

 Cerebral Hemisphere of a Male Egyptian Fellah. The area striata is shaded. 



j a = Sulcus retrocalcarinus anterior ; r' 2 = Sulcus retrocalcarinus intercalatus ; 

 r' s = Sulcus retrocalcarinus verticalis ; x = Sulcus limitans dorsalis area? striata? ; 

 y — Sulcus \lirnit an s Tentralis area? striata?. The fossa parieto-occipitalis consists 

 of the depression in which the three sulci — incisura parieto-occipitalis, sulcus 

 pavacalcavinus, and sulcus limitans precunei — are submerged. 



application of the term calcarine to the latter furrow, which shares so 

 few features in common with the former, and is of such subsidiary 

 importance. The distribution of the area striata indicates the same 

 distinction in a striking manner. For, whereas the sulcus calcarinus 



* " On the Morphology of the Brain in the Mammalia," ' Linn. Soc. Trans.,' 

 2nd Series, Zoology, vol. 8, 1902, p. 386. 



