Abstract

1. The effects of the biogenic amines adrenalin and 5-hydroxytryptamine and of their respective precursors DOPA and 5-hydroxytryptophan on the regeneration of small pieces of the pedal disc of the sea anemore Metridium sinile are analysed. 2. The biogenic amines with a phenolic nucleus had a promotive effect while any eventual promotive effect of the indole alkylamines was disturbed by their toxicity. 3. These results and conclusions are compared with those obtained from similar works on animals from other invertebrate Phyla.

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