Journal of Comparative Neurology and Psychology. 



Urns 



T 1 1 r 



Vol. XVIII, Plate II. 



T r 



BRAIN WEIGHT 



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SPINAL CORD WEIGHT 



BODY WEIGHT 



Gms. 20 40 60 



100 120 140 160 180 



Chart 1. 



200 220 240 260 280 300 320 



Gms. 20 40 60 80 100 120 



140 160 180 



Chart 2. 



200 220 240 260 280 300 320 



