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Characterized by rather slender form , body with appear to combine sebastine viviparity with scorpaenine small scales or bony plates ; head heavily armoured . Lower pectoral fin rays separate , forming a tactile organ .
entire , coiled , lightly constructed shell of Spirula sinks into the body , the animal has internal air spaces that can control its buoyancy and also its direction of swimming . In cuttlefish and squids , a shell that was originally ...
These features enable the animals not only to resist desiccation on land but to exist in damp places without uptake of water — a process that could cause swelling of the body and lead to death . The cuticular endoskeleton is formed by ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review