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In 1892 Cunningham described a new species of Siphonophore, Muggiœa atlantica , which was first noticed by him in the waters of the English Channel off Plymouth in the autumn of 1891. Since then there have been records from time to time of the occurrence of this species at Plymouth (see Plymouth Marine Fauna, 1931, p. 84), and its distribution in the English Channel and Irish Sea in 1904 was worked out by Gough (1905).
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F. S. Russell (1934) studied this question.
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