BRITISH 

 MARINE POLYZOA. 



Class POLYZOA, J. V. Thompson. 

 Subclass HOLOBRANCHIA, E. Ray Lankester. 



Group a. ECTOPROCTA, Nitsche. 

 Order GYMNOL.EMATA, Allman. 



POLYPIARIA INFUNDIBULATA, Gervais, Ann. des Sc. Nat. 1837. 



POLVZOA INFUNDIBULATA, Busk, B. M. Cat. 



Suborder I. CHEHOSTOMATA, Busk. 

 Family I. AeteidaB. 



Zo(ECiA tubular, with a lateral membranous area ; orifice 

 terminal. Tentacular sheath terminating above in a 

 circle of setae, which are everted during the expansion 

 of the polypide. 



THE Aeteida exhibit many points of affinity with the 

 Ctenostomata. The more or less erect, cylindrical cell, 

 with the orifice at the top, and the frill-like termination 

 of the tentacular sheath, which must be regarded as the 

 homologue of the setose operculum, are characters which, 



B 



