最終更新日:2022/12/24

In the Entoprocta these can be easily made out, but in the Ectoprocta it is not always so distinct; in the forms where the zoœcium is elongated we seem to have the primitive disposition, in the flattened ones the tergal surface is increased in extent; palingenesis is to be seen in the Ectoprocta, cœnogenesis in the Entoprocta.

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