Sentence Examples


  • - Trichoplax adhaerens, an organism considered, on the Gastraea-hypothesis, to be closely allied to the progenitors of the Platyelmia.
  • The Gastraea-hypothesis is founded on quite other considerations.
  • To the primitive two-cell-layered form, the hypothetical ancestor of all Metazoa or Enterozoa, Haeckel gave the name Gastraea; the em- bryonic form which represents in the individual growth from the egg this ancestral condition he called a " gastrula."
 
 

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