12 ROBERT S. ELLIS 



The figures given by other observers serve only to strengthen 

 the conclusion that there is no adult sex difference in the relative 

 weight of the cerebellum. BischofT ('80) gives the percentage 

 weight of the 'Kleinhirn' for German males as 12.9 and for Ger- 

 man females as 12.8; as his 'Kleinhirn' includes the brain stem, it 

 means percentage weights for the cerebellum of about 10.9 and 

 10.8, respectively. Meynert ('67-'68) gives values of 11.2 and 

 11.3 for males and females, respectively. Weisbach ('66-'67) 

 reports the percentage weight of the cerebellum to be less in 

 Slavic males than in Slavic females, the values being 10.7 and 

 11.0, respectively, while among the South Germans the corre- 

 sponding values are given as 10.8 (males) and 10.6 (females). 

 No real difference between the sexes is apparent from these fig- 

 ures, and similar results could be given from some other authors 

 without showing any preponderance of evidence on either side. 



Chart 3, to be referred to later, shows the relative weights of 

 the cerebellum in seventy-four male and thirty-three female 

 negroes. This chart might be taken to indicate a relatively 

 larger cerbellum in females of that race, but the number of cases 

 is too small to be conclusive. 



In my opinion, the evidence at hand is so well balanced that 

 we are not safe in assuming for man any difference in the rela- 

 tive weights of the cerebellum in males and females at maturity, 

 although, as has been pointed out, the female cerebellum may be 

 somewhat precocious in its growth and so may be relatively 

 heavier than that of the male during early life. 



The relation of the relative weight of the cerebellum to stature 

 has been examined by Weisbach (op. cit.), and by Marshall (op. 

 cit.). Both agree that as stature increases the relative weight 

 of the cerebellum increases also. If, however, we return to table 

 7, which, I believe, contains the best available data on the sub- 

 ject, we find, if anything, a lower relative weight of the cerebel- 

 lum in tall persons. But the average differences are so small 

 and the variations in the values for individual groups are rela- 

 tively so great that no real significance can be attached to the 

 differences found. We may then, I think, safely disregard Mar- 

 shall's conclusion as to the effect of stature on the relative weight 

 of the cerebellum. 



