STUDY OF BRAINS OF SIX EMINENT SCIENTISTS AND SCHOLARS. 



245 



III. 



Next let us look at the relative dimensions of the two brains : 



Max. length, left hemicerebrum 

 Max. length, right hemicerebrum 

 Max. width .... 

 Circumference 



Left centro-temporal height . 

 Eight centro-temporal height 

 Left centro-olfactory height . 

 Right centro-olfactory height 



Joseph Leidy 's brain is even larger than that of Cope, which weighed 1545 grams. 



IV. 



In view of all this I am led to assume that the error must have arisen during the 

 recording of the weight while in haste as well as under the stress of performing a 

 necroscopy upon the body of a dear friend and associate. 



The Cerebrum. 

 In all its parts the cerebrum shows a high degree of complexity, particularly in 

 the parietal and occipital regions. Viewed dorsally, the cerebrum appears elliptical 

 in shape, the left parieto-temporal region being the most prominent. The left frontal 

 lobe, owing to some flattening while hardening appears less massive than the right, 

 but is not so actually. Although fissural complexity prevails generally, the parieto- 

 occipital regions show the highest degree of differentiation. The left frontal is more 

 complex than the right but it is difficult to decide in which half the caudal regions 

 preponderate in this respect. Generally speaking the right parieto-occipital areas 

 seem more extensive than the left. Viewed laterally, and comparing the two sides, 

 the left preoperculum is the better developed, and the right parieto-occipital and 

 parieto-temporal transitions preponderate over the corresponding regions of the left 

 side. Viewed ventrally, the right temporal lobe is broader, more massive and more 

 richly fissured, and the same may be said for the orbital surface of the right frontal 

 lobe. The right occipital pole, as is usual, is slighly deflected laterad, but appears to 

 be, nevertheless,. more massive than the left. Taking the brain as a whole, the right 

 side seems to preponderate in not a few respects. Its greater weight, together with 

 the more complex degree of fissuration and the greater extent of the caudal parts 

 quite over-balances the high degree of development of the left frontal region. In 

 measuring the horizontal semi-circumferences no appreciable difference can be found 

 between the two sides. 



