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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. 



