338 



ZOOLOGY. 



sented by the circle behind the brain, sp ; Pig. 283, op), 

 which go to the compound eyes, and from the front arise 





illiaa 



liny 



Ilifibsf 



JSS|2ri 

 " 8 tlN^ 



=?;. 

 _- 2 = d 



2-2 &a.H f 



182 



the three slender filaments which are sent to the three ocelli 

 (Fig. 281, oc). From immediately in front, low down, arise 



