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Keywords from Image Description:
Coryne eximia planoblast from Allman . en Syncoryne eximia Cnidaria Hydrozoa Anthoathecata Capitata Corynidae planoblast shortly after liberation very much magnified and as it appears with its tentalcles extended when floating passively in the water Allman The Monograph of the Gymnoblastic or Tubularian Hydroids Conclusion of Part