资料来源 : Webster's Revised Unabridged Dictionary (1913)

Anallantoidea \An`al*lan*toid"e*a\, n. pl. [Gr. 'an priv. + E.
   allantoidea.] (Zo["o]l.)
   The division of Vertebrata in which no allantois is
   developed. It includes amphibians, fishes, and lower forms.