202 EDWARD HORNE CRAIGIE 
lamina zonalis tends to be richer as compared with the other 
layers than is the case in the rest of the brains studied. This 
is believed to be due to an unexplained vacuolate appearance 
Vascularity 
mine Heme CBE gl 
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Cortical saminde 
Fig. 3 Chart showing the relative vascularity of the five cortical areas 
studied and of the five laminae in each. 
T, lamina zonalis I, insular area 
III, lamina pyramidalis O, occipital area i 
IV, lamina granularis interna P, parietal area 
V, lamina ganglionaris Pr 
, praecentral area 
VI, lamina multiformis 
T, temporal area 
in this specimen of. all the layers except the lamina zonalis. 
It seems probable that this condition of the tissue has resulted 
in the measurements for all the inner layers in R.56 being a 
little lower than they should have been. As these results fell 
