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Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n.pl. The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms.

from The Century Dictionary and Cyclopedia

  • Those vertebrates which have no allantois; the Ichthyopsida, or amphibians and fishes: synonymous with Anamnionata, and opposed to Allantoidca.

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