The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 42
... feet ( 15 metres ) higher at the pole than pre- dicted , and about 25 feet ( 8 metres ) lower in the middle latitudes . In the Southern Hemisphere the polar area is 50 feet ( 15 metres ) lower than predicted and the mid- latitudes are 25 ...
... feet ( 15 metres ) higher at the pole than pre- dicted , and about 25 feet ( 8 metres ) lower in the middle latitudes . In the Southern Hemisphere the polar area is 50 feet ( 15 metres ) lower than predicted and the mid- latitudes are 25 ...
Page 182
... 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 ) . Sev ...
... 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 ) . Sev ...
Page 183
... 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 gain a ...
... 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 gain a ...
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