cerebrum of albino rats of different ages. They show the ventral side downward 
on the page. The letters indicate the same structures throughout: ventr, ventral; 
ect, ectal; ent, ental; r, roof; V.iii, third ventricle. 
Fig.5 One-day rat, cervical cord. X S84. 
Fig. 6 Twenty-day rat, cervical cord. 84. 
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