1881.] 



MR. W. A. FORBES ON THE KOALA. 



191 



Fiff. 5. 



Fig. 4. 



Fig. 3. 



Fig. 6. 



a.c. 



Pig. 3. Riglit half of Koala's brain, from above, of the natural size ; drawn 

 before removal from the skull. 



Fig. 4. The same, from below. 



Fig. 5. The same, from the side. 



Fig. 6. Left cerebral hemisphere, from the inside, the optic thalamus being 

 cut short, a.c. anterior commissure ; h. hippocampal sulcus. 



