The hydrozoanHalammohydrafound in Norway

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Abstract
A survey of the marine interstitial fauna off the Biological Station, Espegrend, was started in the autumn of 1961. Among several typical mesopsammal species met with, attention is drawn here to the strange coelenterate genus Halammohydra Remane 1927, the first two species of which were both described by Remane (1927), who found H. octopodidcs in the Kiel Bay in 1924, and H. schulzei at Heligoland in 1925. As the study of the mesopsammon has progressed, Halammohydra has been found at many places along the European coasts, from Skagerrak to the Mediterranean (Fig. 1), and at present four species are known.