. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. / 2 3 '1 Textfig. 1. Stichopus regalis, tables from the dorsal side. X 300. As stated above I supposed at the preliminary examination of the two specimens from St. 3 that they were but young specimens of Parastichopus tremulus. A closer examination of them as well as of the specimen from St. 213 definitely showed that the real genus Stichopus was represented, and as there are no clear dif- ferences between the specimens present and regalis they should be referred to that species. Stichopus
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. / 2 3 '1 Textfig. 1. Stichopus regalis, tables from the dorsal side. X 300. As stated above I supposed at the preliminary examination of the two specimens from St. 3 that they were but young specimens of Parastichopus tremulus. A closer examination of them as well as of the specimen from St. 213 definitely showed that the real genus Stichopus was represented, and as there are no clear dif- ferences between the specimens present and regalis they should be referred to that species. Stichopus regalis is previously recorded from the west coast of Ireland, and there is no doubt that the "Helga" specimens are the same species as those collected by the "Thor". Whether these specimens are in reality the Mediterranean regalis is not quite certain, but as said above there are no clear differences. Genus Parastichopus Clark 1922. Parastichopus tremulus (Gunnerus). Mortensen 1927: British Echinoderms p. 389, figs. 228 1 & 231. Localities: 58 32' X. I 18' E. "Thor" St. 3, 30/4-03, 280 m 3 spec. Skagerrak "Thor" St. 24, 10/3-04, 835 m 1 - there are numerous more or less spiny rods in the body wall as also in the water vascular appendages. In the body wall there are numerous "star shaped" deposits. Parastichopus tremulus does not seem to be widely Textfig. 2. Parastichopus tremulus. tallies from the dorsal side. X 300. It is recorded from the Bay of Biscay and the Canaries, but in spite of this it should be regarded as a Scandinavian and English species. Family Gephyrothuriidae Koehler &\aney. Heding 1935: Holothurioidea of the "Ingolf" Expedition I pag. 77. Heding 1940: Holothurien der Deutsche Tiefsee Expedition II pag. 142. The family Gephyrothuriidae is represented in the collections of the "Ingolf" Expedition by only a few specimens belonging to the two species Molpadiodemas acaudu
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
