857 



these brains rna}' ceitainlj- be considered as having reached their 

 full ponderal development. ') 



Now the following result is obtained : 



{log 77.93 — % 68.93) : {log 9642 — log 7542.5) =: 0.5006 



By comparison of the averages of the corresponding weights of 

 the body and the brain individually, of three adult male vvitii those 

 of four adult female budengs, lecorded in Table II, an exponent 

 of relation 0.5248 is found. 



TABLE II. — Body weight and brain weight of Semnopithecus maurus F. Cuv. 



(Grams) 



It follows that for this monkey species between the sexes an 

 entirely different law for the ratio of the brain weight to the body 

 weight is valid than for the other discussed animal species, i.e. the 

 same as holds for the human species. 



Evidently this deviation with respect to so many other animal 

 species does not on\y rest on the difference of size between the 

 sexes, for then it should be much more frequently found, among 

 others also for the Ox and the Domestic Hen. This quantitative 

 difference in body weight must be accompanied by some other 

 difference, and this must necessarily be a qualitative difference, in 

 contrast also with two homoneuric species, the body weights of 

 which are oidy different as far as the quantity is concerned. 



As genuine secondary sexual characteristics of a qualitative nature 

 the following are well-known. In all the races of Mankind woman 



1) J. H. F. KoHLBRUGGE, l.c, p. 48 : "Bei Semnopithecus erreicht dasGehirnso 

 frühzeitig sein Maximalgewicht dass es schon bei Sauglingen dem erwachsener 

 Thiere ganz nahe stehl". 



