( 353 ) 



Fig. 5. 



Fig. 0. 

 Y\(r. .") ;u»(l (t. Dorsal and ventral ciMitral area. 



(•tilled two da\s after the operalion. 



l.'ij_r, 7. Tl,,. sai ioii from Fig. 2 anil :?, photograjilied in am.tlier attitude in order 



Lu sliow llie whole of the ventral piece of the central area. 



