The New Encyclopaedia Britannica: Macropaedia : Knowledge in depth |
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Page 311
... Bivalves ( clams , oysters , mussels , and relatives ) The class Bivalvia , sometimes called Pelecypoda , is char- acterized by a shell that is divided from front to back into left and right valves . Enclosure in a shell has resulted in ...
... Bivalves ( clams , oysters , mussels , and relatives ) The class Bivalvia , sometimes called Pelecypoda , is char- acterized by a shell that is divided from front to back into left and right valves . Enclosure in a shell has resulted in ...
Page 312
... bivalve shells are used in the manufacture of jewelry and ornaments . Bivalves are important agents in bioerosion , most no- tably of calcium carbonate rocks and wood in the sea . Piddocks ( family Pholadidae ) bore into concrete ...
... bivalve shells are used in the manufacture of jewelry and ornaments . Bivalves are important agents in bioerosion , most no- tably of calcium carbonate rocks and wood in the sea . Piddocks ( family Pholadidae ) bore into concrete ...
Page 316
... bivalves ( e.g. , Palaeotaxodonta ) there are four pairs of ganglia - cerebral , pleural , pedal , and visceral . In all other bivalves the cerebral and pleural ganglia are fused into two cerebropleural ganglia , located above and on ...
... bivalves ( e.g. , Palaeotaxodonta ) there are four pairs of ganglia - cerebral , pleural , pedal , and visceral . In all other bivalves the cerebral and pleural ganglia are fused into two cerebropleural ganglia , located above and on ...
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