TABLE 1 



Forebrain: Constituents in -percentage of fresh tissue 



1 The two brains of this age that were used for this analysis were not sepa- 

 rated into cerebellum, forebrain, and stem, because the brains were too small 

 to make good samples of these divisions. For purposes of comparison the 

 whole brain was arbitrarily divided into cerebellum 10 per cent, brain stem 10 

 per cent, and forebrain 80 per cent. 



2 The same is true of this brain. 



3 See section on limitations. 



4 See section on limitations for explanation of this low figure. 



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THE JOURN.VL OF COMPARATIVE NEUROLOGY, VOL. .30, NO. 5 



