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In this way the animal gradually approaches the Prawn-form, in which the median eye has become indistinct, the spine of the labrum, and the outer branches of the cheliferous and ambulatory feet have been lost, the mandibular palpi and the abdominal feet have acquired distinct joints and setae, and the branchiae come into action. The minute buds of the third pair of maxillipedes are visible.
But what is most remarkable is, that they now appear under two different forms. The terminal setae of the second pair of antennae project between the cheliferous feet. Buccal region of the same from below; lambda, labrum. Head of the rarer form of the male, magnified 25 times. In the first place, and before inquiring into its significance, I will say a word upon this fact itself.
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