J. B. JOHNSTON 
404 
nuc. olf. med. 
me 
lenc 
tele 
re 
isp 
gram similar to that of figure 40, drawn on the outline of the brain 
a 
ig. 41 Di 
Fi 
Owing to the somatic 
Drawn from the bisected brain. 
of Squalus acanthias. 
receptive area being situated on the lateral surface of the telencephalon, its pro- 
The medial sulcus limitans 
avy line along the lower border of the primordium. 
figure overlaps the olfactory area. 
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8 
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aped flexure of the visceral receptive column, the 
tes the U-sh 
his figure illustra 
r 
© 
at the base of the U, and the position of the 
c 
© 
attachment of the olfactory peduncle 
« 
The axis of the brain 
ends in the recessus praeopticus and the great forebrain flexure involves only the 
dorsal columns. 
een the two limbs of the U. 
somatic receptive area betw 
