Abstract
DR. A. C. STEPHEN has published two memoirs relating to this group. He had a difficult task before him, for it is well known that its members are extremely elusive owing to their habitat and that the few specimens usually available are frequently damaged-a fact borne out by a species sometimes only being represented by an isolated introvert or flattened skin. It is therefore specially to be appreciated that so many specimens were brought up whole and undamaged and that colour notes made at the time of capture are available. The Discovery species are mainly from southern waters but some of the Sipunculids were secured in the Atlantic on the outward and homeward runs. Only one species is recorded in both reports-Pyscosoma nigrescens Keferstein, a widely distributed form in tropical waters, now obtained for the first time from Ascension and Tristan da Cunha. There are two new species from deep water from the Gulf of Oman and off the Maldive Islands, and one from the Gulf of Aden ; also one new species of Thalassema from the Antarctic. The most interesting records, however, are those relating to bipolar species.
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RESENT WORK ON THE GEPHYREA*. Nature 149, 57 (1942). https://doi.org/10.1038/149057a0
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DOI: https://doi.org/10.1038/149057a0