Abstract
SEEING the interest which Colonel Hersche's letter (NATURE, January 18) has attracted, and the various animals he has himself observed, it may be useful to record as many animals as possible which exhibit the phenomenon. Going into the aquarium one evening with a reading lamp. I found the eyes of the crayfish (Jasus lalandii, M. Edw.) shining like rubies out of the darkness. I soon discovered the correct position in which the source of light should be. Even more brilliant and beautiful are the eyes of the prawn (Leander squilla, Linn.), but the colour is more an orange tint.
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BARNARD, K. Are Eyes Autophanous?. Nature 89, 138 (1912). https://doi.org/10.1038/089138b0
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DOI: https://doi.org/10.1038/089138b0
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