Plate 6.2 Polyorchis penicillatus, a hydromedusan. Typical bell height about 1.5 cm.
(© Monterey Bay Aquarium.)
Plate 6.3 A calycophoran siphonophore. The nectophores or swimming bells are at
the left, a long chain of tentacle-bearing gastrophores extending behind.
(^) (© Monterey Bay Aquarium.)