The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 182
... tube feet in special grooves called ambulacral furrows . The upper ( aboral ) surface of the disc has a centrally lo- cated anus ( often absent ) and the sieve plate ( madrepor- ite ) of the water - vascular system ( described below ) ...
... tube feet in special grooves called ambulacral furrows . The upper ( aboral ) surface of the disc has a centrally lo- cated anus ( often absent ) and the sieve plate ( madrepor- ite ) of the water - vascular system ( described below ) ...
Page 183
... tube feet of 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 ...
... tube feet of 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 ...
Page 185
... tube feet ; tube feet , radial water vessels , and other structures restricted to mouth ( oral ) surface of body . Class Stelleroidea Features as subphylum above . Subclass Somasteroidea . Fossil and living forms ( Ordovi- cian to ...
... tube feet ; tube feet , radial water vessels , and other structures restricted to mouth ( oral ) surface of body . Class Stelleroidea Features as subphylum above . Subclass Somasteroidea . Fossil and living forms ( Ordovi- cian to ...
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