180 ANTENNATA. APODA. 



OEDER n -ANTEMATA. 



An antenniferous head, provided with eyes ; and having 

 a projectile proboscis frequently furnished with jaws ; and 

 setiferous papillae, which are pediform and retractile ; the 

 branchiae are longitudinally disposed. 



Section I — Branchiae arranged in the form of complicat- 

 ed tufts or leaflets, or ramose, constantly large and apparent; 

 without spines. 



To this section belong the Aphroditae, Nereidae, Eunicae, 

 and Amphinomeae; none of which are furnished with shells. 



OEDEH m.-APOM. 



No feet, or retractile setiferous, pediform mammilles ; no 

 antenniferous head ; branchiae disposed longitudinally in the 

 interior. 



Hirudinea, and Echiurea. 



