A tadpole is the larva of a tailless Batrachian after the loss of the external gills and before the egress of the fore limbs (except in the aberrant Xenopus) and the resorption of the tail. [Please select]
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Half a young Sea-urchin immediately after resorption of the larva; _s''_ _s''_ spines, _t'_ _t'_ ambulacral tentacles. [Please select]
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182 represents an Ophiuran at the moment when the process of resorption is nearly completed, though the arms of the Pluteus, greatly diminished, are still to be seen protruding from the surface of the animal. [Please select]
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