. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. STYLASTERIDAE *3 The fan-shaped colonies are in general branched in one plane and not recurved; they display a marked difference between small branches, main branches and stem. The cyclosystems are placed laterally and alternately on the small branches; their main axis forms an angle of 450 or more with the longitudinal axis of the branch. The cyclosystems are circular except on the thick main branches, where they have a more oval form. The cyclosystem shows from 8 to 17, in general 9—11 quite separate dactylopores, each pro
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. STYLASTERIDAE *3 The fan-shaped colonies are in general branched in one plane and not recurved; they display a marked difference between small branches, main branches and stem. The cyclosystems are placed laterally and alternately on the small branches; their main axis forms an angle of 450 or more with the longitudinal axis of the branch. The cyclosystems are circular except on the thick main branches, where they have a more oval form. The cyclosystem shows from 8 to 17, in general 9—11 quite separate dactylopores, each provided with an almost rudimentary dactylostyle. The wall of the gasteropore has quite a small incision towards the dactylopores. The gasterostyle is almost spherical with the same height as breadth. The gasterozooid has four very small tentacles. - The male am- pullae generally contain 4 to 6 gonophores and are scarcely seen on the surface of the colony. The female ampullae appear like hemispheres on the surface of the colony; they are smooth, without spines. The surface of the colony is smooth and faintly reticulate. Colour: rose with lighter stem and main branches. Occurrence: Atlantic Ocean in depths from 230 to 1400m. Material: "Ingolf" St. 7 63°i3' N., i5°4i' W - 15 66°i8' - 25°59' - - 17 62*49' - 26°55' - - 52 63°57' - i3°32' - - 94 64°56' - 36°i9' - "Thor" 1904 65°5o' - 26°53' - East Greenland Expedition. Off Angmagsalik At first glance Stylaster roseus is confusingly like the preceding species; it may especially be easily confounded with such colonies of the latter as are represented in figs. 5 and 6 of PI. I. Closer examination however shows that there are great and constant differences between the colonies, so that they must be taken as representatives of different species. The first mark of distinction apparent on com- paring larger colonies is the form of colony itself. In Stylaster roseus there is a greater difference between the mai
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