The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 180
... crinoids ( sea lilies ) , which apparently lack a dipleurula larval stage , have a barrel - shaped larva called a doliolaria larva . The doliolaria larva also occurs in other groups ; in holothurians , for example , it is the de ...
... crinoids ( sea lilies ) , which apparently lack a dipleurula larval stage , have a barrel - shaped larva called a doliolaria larva . The doliolaria larva also occurs in other groups ; in holothurians , for example , it is the de ...
Page 182
... crinoids , ophiuroids , and holothurians . The complex feeding ap- paratus of echinoids ( Aristotle's lantern ) consists of 40 ossicles held together by muscles and sutures . Crinoids ( sea lilies ) have a hollow sheath ( theca or ca ...
... crinoids , ophiuroids , and holothurians . The complex feeding ap- paratus of echinoids ( Aristotle's lantern ) consists of 40 ossicles held together by muscles and sutures . Crinoids ( sea lilies ) have a hollow sheath ( theca or ca ...
Page 183
... crinoids , which are found in clumps of three on the arms and barblike structures ( pinnules ) pro- jecting from them , spread a net of sticky mucus that traps small organisms . In ophiuroids , the tube feet are used to gain a hold on a ...
... crinoids , which are found in clumps of three on the arms and barblike structures ( pinnules ) pro- jecting from them , spread a net of sticky mucus that traps small organisms . In ophiuroids , the tube feet are used to gain a hold on a ...
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