The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 180
... holothurians , for example , it is the de- velopmental stage after the auricularia larva , which may not occur in some species . A doliolaria larva usually contains large quantities of yolk material and moves with the aid of several ...
... holothurians , for example , it is the de- velopmental stage after the auricularia larva , which may not occur in some species . A doliolaria larva usually contains large quantities of yolk material and moves with the aid of several ...
Page 181
... Holothurians use tentacles and contraction of the body wall in burrowing that generally is related to feed- ing . Several asteroid species bury themselves in sandy or muddy areas . The characteristic position of several ophi- uroid ...
... Holothurians use tentacles and contraction of the body wall in burrowing that generally is related to feed- ing . Several asteroid species bury themselves in sandy or muddy areas . The characteristic position of several ophi- uroid ...
Page 184
... holothurians and aster- oids forming another . Recent biochemical studies of pig- ments and other complex substances found in echino- derms also indicate ophiuroid - echinoid and asteroid- holothurian relationships . On the other hand ...
... holothurians and aster- oids forming another . Recent biochemical studies of pig- ments and other complex substances found in echino- derms also indicate ophiuroid - echinoid and asteroid- holothurian relationships . On the other hand ...
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activity Africa agriculture America became become body called capital caused central centre century changes Christian Church continued core countries cultural demand direction early Earth East Eastern eclipse economic effect established Europe example feet field Figure flow force groups growth important income increase industry internal investment Italy kilometres known labour Lake land later less living magnetic major mantle material means measurements ment metres miles mountains move movement nature North observed occur ocean organization origin Orthodox patriarch percent period planning Pleistocene political population position possible present problems production region relatively remained result rise River rocks social society South species structure surface theory tion trade traditional United West Western