400 ELIZABETH CAROLINE CROSBY 
Fig. 37 This isa diagram of a transverse section through the hemisphere at 
the level of the primordial infolding. The cells of this primordial general cortex 
are round or goblet shaped (fig. 40) and have their dendrites directed outward 
and their axones inward and downward into the striatum. The axones come into 
relationship with the projection cells of the striatum, and, after a synapse, the 
impulse is carried by the axones of these projection cells through the lateral fore- 
brain bundle to the lower centers. Impulses reach the primordial general cor- 
tex from the hippocampus, the pyriform lobe and the thalamus (by way of the 
lateral forebrain bundle). The interpolated neurone (Intr.C.) pictured in the 
diagram was not brought out very clearly in the Golgi sections, for, although 
neurones of that type were seen in the sections, they were never clear enough 
for high power drawings. Several types of neurones can be distinguished in the 
toluidin blue sections and the cell labeled ‘intrinsic cell’ is a guess at one of their 
probable functions. 
