TERMS USED IN DESCRIBING POLYZOA 
Avicula’ria: Specifically modified zocecia, resembling a bird’s 
head, found only in the Cheilostomata. 
Brown bodies: Brown pigment-masses contained in the zo- 
cecia 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 zocecium. 
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 zocecium. 
Vibra’ cula: A lashing filament, or specifically modified zocecia, 
found only in the Cheilostomata. 
Zoa’rium; The whole colony. 
Zoc’cium: The body-wall of a single individual. 
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