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Marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces.
I have lately got a bisexual cirripede, the male being microscopically small and parasitic within the sack of the female.
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I have re-read many parts, especially that on cirripedes, with the liveliest interest.
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CIRRIPEDES.-Anorder of Crustaceans including the Barnacles and Acorn-shells.
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The rhizocephalous crustaceans are allied to the cirripedes.
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September 9th: Finished packing up all my Cirripedes.
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I used for cirripedes "cement gland."
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The ovigerous frena of certain cirripedes, which have ceased to give attachment to the ova and are feebly developed, are nascent branchiae.
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[In September, 1854, his Cirripede work was practically finished, and he wrote to Dr. Hooker:
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-TheBalanidae (or Sessile Cirripedes); the Verrucidae, etc.
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These cirripedes have no branchiae, the whole surface of the body and of the sack, together with the small frena, serving for respiration.
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The ovigerous frena of certain cirripedes, which are only slightly developed and which have ceased to give attachment to the ova, are nascent branchiæ.
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In this last and complete state, cirripedes may be considered as either more highly or more lowly organised than they were in the larval condition.