| It is this social character, indeed, which gives the plant-like form to the Hydrozoa and Polyzoa, the Polypes and Zoophytes of the older naturalists. |
| While the Cubozoa always have polyp and medusa stages, either one can be reduced in the Hydrozoa and Scyphozoa. |
| These include some Foraminiferida, Hydrozoa and Scleractinia, Bryozoa, Brachiopoda, Pelecypoda, Polychaeta, and Cirripedia. |
| Traditional systematics divides the Hydrozoa into five orders. |
| The coenosarc does not differ in structure from that already described in colonial Hydrozoa. |
| Phospholipase A 2 activity has been detected in the homogenized tentacles and acontia of cnidarians including subphylums Anthozoa, Schyphozoa, Hydrozoa and Cubozoa. |
