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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 . Locally egg masses ...
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 chambered has ...
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