. The Danish Ingolf-expedition. Marine animals; Marine animals; Hydrography; Hydrography; Scientific expeditions. HYDROIDA II 51. Oven. Fig. XXII. Finds of Halecium minutum in the Northern Atlantic. small sympodial parts, normal in appearance, arise from enormous rhizocaulome formations instead of from creeping stolons. This, as Kramp also points out, places the question of growth conditions as generic character in a remarkable light; and what is worse, it shows us that the shape of the colony can even in specific limitation only be applied with great discretion, a point which has also been no
. The Danish Ingolf-expedition. Marine animals; Marine animals; Hydrography; Hydrography; Scientific expeditions. HYDROIDA II 51. Oven. Fig. XXII. Finds of Halecium minutum in the Northern Atlantic. small sympodial parts, normal in appearance, arise from enormous rhizocaulome formations instead of from creeping stolons. This, as Kramp also points out, places the question of growth conditions as generic character in a remarkable light; and what is worse, it shows us that the shape of the colony can even in specific limitation only be applied with great discretion, a point which has also been noted here under the heading of Lafoeidoe. Kramp thus supports my supposition (1909 p. 153) that the colonies which Jaderholm (1907) mentions from the Bering Sea under the name of Halecium telescopicum should more probably be ascribed to Halecium minutum. Halecium minutum is an arctic species which has doubtless a considerable distribution in the Polar Sea, but which is often confused with others, and especially with Halecium tenellum, as is also clearfy evident from the list of investigation material given above. Apart from the Bering Sea, the species has been recorded at Spitzbergen, the Murmau coast, east and north coasts of Iceland, northern east coast of Greenland, and several places along the west coast; finally also Fraser (1913 p. 168) has met with it at Nova Scotia, on the Canso Bank. The species penetrates but very slightly into the boreal region, as far as can be seen from the finds made up to now. Family Plumulariidae. The hydrothecse are small, sessile, approximately radially symmetrical, one side partly or en- tirely fused with the branches (tubes); the diaphragm is somewhat asymmetrical. The large polyps can practically speaking never be drawn entirely into the hydrothecse. The sarcotheca; are two-chambered, 7*. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of t
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectmarineanimals
