J506 PHYSIOLOGICAL HI; II-. 



\ 'Ttiral, sulciis ill front of the suprasvlvian. The u lateral" 

 scries of sulci is represented hy a group of short, irregular, 

 and richly branched sulci between the suprasylvian sulcus 

 and the mesial edge of the hemisphere*. 



Fig. 177. 



-OLF. BUL3. 



Concerning the moial a.-peet of the hemisphere nothing 

 can be said with certainty. 0. ('. U;>1 A. 



Krueg, Zeitsch. f. wiss. Zool., Bd. xxxiii. l.SSO, p. u.vj. 

 Flatau & Jacobsohn, Gentralnervensyst, d. SiiugrihiiTt 1 , 

 1899, pp. 423 & 43,'). 



* In the absence of any developmental data, it is quit.* impoilil.' to 

 .-ati.-factorily solve the problem ol'intrrpivtiiifr the in\nl\.'d inni-le of short, 

 branching, and intertwining sulci in the Elephimt'tf brain. The homologiei 

 suggested above an- merely those which ^cein most likely. I have tlicr'lnir 

 inserted three illustrations of this brain, which have been dnnvn 

 photograjihs so as to be quite accurate ; and, as such a huge ins> <>f suft 

 tissue is ,-pecinlly linble to distortion, a drawing of a cast of the cranial 

 cavity has been placed alongside each to show the true shape of the brain. 



If we compare the brain of the Elephant with those of such Ungulates as 

 the Tapir (figs. 179& 180), and especially the Hippopotamus (figs. 185 & 

 186), we shall gain a much more accurate conception of the meaning of the 

 Proboscidean pattern of sulci than a study of the Elephant's brain alone 

 could afford. 



In the bra iu of the Hippopotamus (fig. 185) the suprasylvian sulcus (which 

 nts a cloee resemblance to the complex of the sulci A and u of tin 



