. fig* 10* Tunicates photographed under u)at\ TUNICATES (Sea Squirts) Tunicates are soft—bodied, more or less leath- ery animals of various irregular shapes, often with a translucent covering (figs. 10 and ll) , Each individual has two openings, one used as the intake and the other as the discharge for the sea water from which they sift their food, but as some kinds are colonial, a single mass may have more than one pair of holes. From their habit of expelling sea water, sometimes from both openings at once, these animals have also received the name of sea squirts. 20

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