,.._..^g 



la^ eye lobe 

 ch.c layef 



I'Jalc \1. 



-i eye nerve 

 L....ch,c I. 



IVapp.gans- 



-.S^^app gang 



Hori/oiilal Soclion Ihioiipli ilic l)i-;iiii of m 



vol II lo j.iiniili m 



