41G 



CYCLOSTOMATA. 



Fig. 21. 



Crisia eburnra. 



Suborder II. CYCLOSTOMATA, Busk. 



CYCLOSTOMATA, Busk : Smitt : &c. 

 TUBULIPORINA, Milne-Edwards : Johnston : &c. 

 AULOPORINA (part.), Ehrenberg. 

 MYRIOPORINA (part.), Ehrenberg. 

 CERIOPORINA (part.), Bronn. 

 CENTRIFUGINEA (part.), D'Orbigny. 



Group i. RADICELLATA, D'Orbigny. 



RADICELLATA, D'Orbigny (1850) : Smitt. 

 ARTICULATA e. RADICATA, Busk (1859), Crag Polyzoa. 



ZOARIUM erect, articulated, attached by radical tubes. 



