Abstract
A VERY complete and up-to-date account of the echinoderms of the North Sea and Baltic is given by Th. Mortensen and I. Lieberkind in Lief. 12, Teil 8, Echinoderma, of Grimpe and Wagler's “Die Tierwelt der Nord- und Ostsee” (Leipzig: Akademische Verlagsgesellschaft m.b.H., 1928). In the 128 pages a large amount of information is compressed and the whole résumé is of great value. Keys similar to those already given in Dr. Mortensen's larger works facilitate the identification of species, and the illustrations are beautifully clear and generously scattered throughout the text.
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Northern Echinoderms and Teleostei. Nature 124, 561 (1929). https://doi.org/10.1038/124561a0
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DOI: https://doi.org/10.1038/124561a0