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ZOOPHYTA. 
I. CARNOSA. — Polypi connected with a fleshy substance. 
II. CELLULIFERA. — Polypi lodged in calcareous cells, 
imperforate at the base. 
III. THECATA- — Polypi surrounded by a membranaceous 
tube, covering the subdivisions of their compound body. 
IV. NUDA. — Polypi naked, the mouth with marginal tenta- 
cula. 
V. VIBRATORIA.^ — Polypi having the mouth furnished 
with vibrating hairs. 
