OF ARTS AND SCIENCES. 211 



The second is crowded outward, and arises in common with the third. 

 The first is a good deal cut up by secondary fissures. The under sur- 

 face of the frontal lobe is very simple, especially on the right side. In 



This drawing, tliough made from tlio brain, is meant rather as a diagram 

 than as an accurate representation. The letters A and B are placed respec- 

 tively on tlie anterior and posterior central couvolutions. The anomalous bridge 

 is between them. 



the parietal region, the superior parietal lobe (of Ecker, the prascuneus 

 of BischofF), is perhaps uncommonly large. On the left side, it sends a 

 narrow prolongation far down beliind the posterior central convolution. 

 The arrangement of the convolutions turning round the fissure of Silvius 

 and running to the apex of the temporal lobe is remarkably simple, 

 though, according to Bischoff, this part is usually complicated in 

 European (i.e., Caucasian) brains : the one in question is in this 

 respect even simpler than that of the " Hottentot Venus." There is 

 nothing important to record concerning the occipital lobe. The 

 median surface may be briefly discussed. The right jissura calloso- 

 marginalis is interrupted by a bridge on the upper part of its course. 

 The occurrence of a bridge is not uncommon, but usually it is placed 

 lower down in front of the corpus ccdlosum. This fissui'e, after turn- 

 ing up behind the posterior central convolution, runs a considerable 

 distance into the pra^cuneus, farther on the right than on the left. 



