TERMS USED IN DESCRIBING POLYZOA 



Avicula'ria : Specifically modified zocecia, resembling a bird's 

 head, found only in the Cheilostomata. 



Brotvn bodies : Brown pigment-masses contained in the zo- 

 oecia and derived from the breaking down of the polypides. 



Lo'phophore : The disk bearing the mouth and circlet of ciliated 

 tentacles. 



Orifice : The open end of the zooecium. 



Ovicell : The receptacle in which the eggs develop. 



Pe'ristome : The ridge around the orifice of cell. 



Po'lypide: The parts of the animal within the zooecium. 



Vibra'cula: A lashing filament, or specifically modified zocecia, 

 found only in the Cheilostomata. 



Zoa'rium : The whole colony. 



Zooe'tium: The body- wall of a single individual. 



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