Light Sensitivity of the Aquatic Flatworm Dendrocoelum lacteum

@article{Pirenne1955LightSO,
  title={Light Sensitivity of the Aquatic Flatworm Dendrocoelum lacteum},
  author={M. Pirenne and F. Marriott},
  journal={Nature},
  year={1955},
  volume={175},
  pages={642-642}
}
WE have measured in various parts of the spectrum the amounts of radiation necessary to elicit in the planarian Dendrocoelum lacteum, a characteristic response, namely, movement away from a source of light1. In each trial, one animal was dropped into a square ‘Perspex’ tank (50 cm. × 50 cm., 10 cm. deep) filled with lake water, in front of a calibrated source of spectral radiation placed outside the tank (opal electric bulb, ‘neutral’ wedges and colour filter2). D. lacteum, being milky-white in… Expand
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