PLATE 6 



EXPLANATION OF FIGURES 



24 Wax model of the mid-brain ventricle of a 110-mm. pig, viewed slightly from 

 below and behind. X 15 diam. 



25 Wax model of the cerebral ventricles of a 260-mm. pig. X 3 diam. 

 20 Ventral view of the same model. 



250 



