210 



THE EYE IN EVOLUTION 



MYRIAPODA 



The MYEiAPODS (the quick-moving, carnivorous solitary centipedes 

 or Chilopoda^ some with more, some with less than 100 legs, and the 

 slow-moving vegetarian, gregarious millipedes or Diplopoda) are 

 characterized by the possession of two groups of ocelli forming aggregate 

 eyes on either side of the head so closely packed together as to suggest a 

 compound eye (Figs. 207 to 210); so close are they in the Chilopod, 

 Scutigera, that they form a pair of true compound eyes (Grenacher, 



Figs. 207 to 210. — The Aggreg.a.te Eyes or Myriapods 

 (Specimens from Natural History Museum, London). 



Fig. 208. 



Fig. 209. 



Fig. 210. 



Figs. 207 and 209. — The centipede, ScoJopendra morsitans from India. 

 The jToup of 4 ocelli, E, are situated on either side of the head. 



■ ':s. 208 AND 210. — A iSpirostreptid millipede from the Seychelles. 

 Thi .iip of ocelli forming an aggregate eye, E, is seen on either side above 

 the a , iinae. Fig. 210 shows the close resemblance to a true compound eye. 



