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Keywords from Image Description:
The Monograph of the Gymnoblastic or Tubularian Hydroids. Plate XVI. Podocoryna carnea and Hydractinia echinata Hydrozoa Anthoathecathae Filifera Hydractiniidae portion of colony of Pocoryna carnea magnified sterile hydranths in various states of contraction proliferous hydranths laden with planoblasts the planoblasts in various