Archive image from page 235 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5bpt5a8daniuoft Year: 1899-1953 84 HYDROIDA II sinuous. The internodial ribs of this variety are also somewhat more strongly marked than in the common form, and it likewise shows a more pronounced indication of intrathecal septum. The features mentioned, that the species can at times lack phylactogonia, show that Clado- carptis Fourtalesi must be considered as a synonym. The difference between this species and Clado- carpus Holmi\ not apparent from Levinsen's description of the
Archive image from page 235 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5bpt5a8daniuoft Year: 1899-1953 84 HYDROIDA II sinuous. The internodial ribs of this variety are also somewhat more strongly marked than in the common form, and it likewise shows a more pronounced indication of intrathecal septum. The features mentioned, that the species can at times lack phylactogonia, show that Clado- carptis Fourtalesi must be considered as a synonym. The difference between this species and Clado- carpus Holmi\ not apparent from Levinsen's description of the latter (1893 p. 67) and an investig- ation of the type specimens shows that the species has been founded on typical colonies of Clado- carpus integer. ZCQO rrt. 1m<;- XI,IV. The distribution of Cladocarpus integer in the northern .Atlantic. In the hatched re<rions the Hterature a scattered occurrence. The species is a typical warm atlantic form, which appears to have its chief occurrence in the western Atlantic, in the lower part of the littoral region and the upper part of the abyssal. In northern waters, it has long been known from the west coast of Norway, and is also found to be a not alto- gether infrequent visitor to Greenland, both in Davis Strait and up towards Danmark Strait (fig. XLIV). On one occasion, it was met with off the east coast of Iceland, at the boundary of the arctic deep region. Tliat il lias not yet l)een located with certainty between the British Isles and Iceland must be due to accident. Ritchie (1912 p. 228) had before him a specimen brought home by Hull trawlers, and we may doubtless presume that it would then have originated from the northern slope of the North Sea plateau or from the Faroe Islands Banks.
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