red colour of, due to Dinoflagellata, [132]

Sea-anemones, [326], [365], [377]

Sea-cucumbers (= Holothuroidea), [561]

Sea-fans (= species of Gorgonacea), [350]

Sea-lilies (= Crinoidea), [580] f.

Sea-pens, [326], [358]

Sea-pansy, [364]

Sea-urchins(= Echinoidea), [503];

ovum of, [7]

Secondary body-cavity (= Coelom, q.v.)