. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. i6 HYDROIDA. Hartlaub (1907) informs us that in his aquaria he has observed a Syncoryne, whose gono- phores are not set free, though being full-grown medusae with four tentacles well developed; the generative products are developed in the sessile medusa, which is reduced after having performed her generative task. Hartlaub refers this form to Coryne (Syncoryne) Loveni M. Sars. This identifica- tion however, cannot be right; most likely we have here rather in hand individuals of the Coryne Sursii during the part of the genera
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. i6 HYDROIDA. Hartlaub (1907) informs us that in his aquaria he has observed a Syncoryne, whose gono- phores are not set free, though being full-grown medusae with four tentacles well developed; the generative products are developed in the sessile medusa, which is reduced after having performed her generative task. Hartlaub refers this form to Coryne (Syncoryne) Loveni M. Sars. This identifica- tion however, cannot be right; most likely we have here rather in hand individuals of the Coryne Sursii during the part of the generative period when the medusae are not detached. Through Mr. C. Dons, conservator at Tromso, I received a very copious material of Coryne Loveni from Bjarkoi, where the species occurs in abundance on the Fucoidea in the tidal water region. The large number of individuals examined have most frequently two, more rarely three gonophores, which are developed into a complete medusa without any tentacles. The four radial canals end in a small enlargement, which is the only indication of tentacles traceable. The species, accordingly, cannot be identical with the form recorded by Hartlaub, but agrees very well with the description and the illustration given by Loven. Coryne Loveni is earlier known only from the west coast of Scandinavia1. Jaderholm (1909, taf. 1, fig. 7) gives an excellent drawing of the species collected from Bohuslau; elsewhere it is recorded from the coast of Norway from Bergen as far as Lofoten, where its occurrence in the northern part of its habitat is most numerous. Some colonies from Godthaab show us that Coryne Loveni must also be added to the fauna of Greenland. The species is native to the boreal tidal water zone and attains to its most luxuriant development in the passage to the regions of the Artie Ocean. Coryne pusilla Gartner. 1774 Coryne pusilla, Gartner, in Pallas: Spicilegia zoologica vol. 1, fasc. 10, pag. 40; pi. 4, fig. 8. 1893 Syncoryne mirabilis L,
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