Discovery of Eurytemora thompsoni at Lancing

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THE discovery of Eurytemora thompsoni by Mr. Lowndes at Lancing1 adds one more puzzle to the problem of the distribution of the fresh- and brackish-water fauna. A rather, similar case of unaccountable distribution is that of Acartia tonsa, a copepod which was discovered in 1927 in brackish water in a canal at Caen (Normandy). This is a coastal species of very wide distribution, recorded from the Pacific, Indian Ocean, and North American coast of the Atlantic, but not from its eastern shores. In the case of the anemone, Sagartia luciœ, the agency of ship transport is fairly obvious; but it is not very convincing for Calanoid copepods, especially when, as in the case of E. thompsoni, the locality has no connexion with any harbour. Still, such transport cannot be excluded. I have found S. luciæ myself in a brackish pond in Norfolk far from any port.

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    NATURE, 128, 967, Dec. 5, 1931.

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GURNEY, R. Discovery of Eurytemora thompsoni at Lancing. Nature 129, 98 (1932) doi:10.1038/129098c0

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