318 



ZOOLOGY. 



gented by the circle behind the brain, sp ; Fig. 278, op), 

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



C3***-, fc- " 



T'a eo 'lIIl 

 rf S g. is . a 



i- 2*0 " n 



. S^a.2 S^ 



fci o c '' 2 ? 5 a" 

 c= =CP 



the tliree slender filaments which are sent to the three ocelli 

 (Fig. 276, oc). From immediately in front, low down, arise 



