APHRODITAD^E. 



105 



Polynoe (Lamk.). Shield-plates, twelve pairs 

 alternating with the superior cirri, and followed 

 by a number of supplementary shield-plates, 

 appearing and disappearing in another order ; four 

 or five antennae ; four eyes ; proboscis with horny 

 jaws. 



P. squamata. P. viridis. 



cirrata. Fig. 179 ; n. s. scolopendrina. 



impar. semisquamosa. 



176 



Aphrodita (Pallas). Shield-plates and superior 

 cirri not on the same feet, but alternating ; jaws 

 cartilaginous and rudimentary, or none; three 





