156 



EYES OF CRUSTACEA. 



of action of the eyes of the Myriapods and as to their 

 internal structure, differs entirely from that of Graber. 



Fig. 105.— Leptodora byalina. 



The Eyes of Crustacea. 



The eyes of many Crustacea are highly developed. 

 In the higher families (thence named Podophthalmata, 



