. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. io6 CRUSTACEA MALACOSTRACA. VI. The specimens from Jan Mayen (fig. 26) differ from the types in the following characters [& ad., cS mm.). Ant. 1: flagellum 18-articulate, accessor}' flagellum 2/5 as long as flagellum, 6-articulate. Ant. 2: twice as long as ant. 1, flagellum 32-articulate. Pereiopoda exactly as in the specimens from Cape Borlase Warren, with the exception that metacarpus in p. 2 is not so highly setose. Ep. 3 exactly as in T. (G. O. Sars 1895, PI. 28 fig. 2),
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. io6 CRUSTACEA MALACOSTRACA. VI. The specimens from Jan Mayen (fig. 26) differ from the types in the following characters [& ad., cS mm.). Ant. 1: flagellum 18-articulate, accessor}' flagellum 2/5 as long as flagellum, 6-articulate. Ant. 2: twice as long as ant. 1, flagellum 32-articulate. Pereiopoda exactly as in the specimens from Cape Borlase Warren, with the exception that metacarpus in p. 2 is not so highly setose. Ep. 3 exactly as in T. (G. O. Sars 1895, PI. 28 fig. 2), hind corner not turned upward as in the type-specimens of T. Schneideri. Us. 1 with the dorsal process at the hind end a little more abrupt than in the type. Up. 3 has rather long setose rami; inner ramus reaches to the end of proximal end of outer ramus. Telson somewhat longer than peduncle of up. 3, with fissure almost to the base, and 3—4 pairs of dorsal spines. Distribution. Some places near Tromso, N. Norway, 5—60 m. (K. Stephensen 1921, p. 7). The species is probably a (boreo-) Arctic littoral species. *9i. Tryphosa abyssalis n. sp. (Fig. 27). Occurrence. This new species was once taken by the "Ingolf" S. of Jan Mayen: St. 113: 69°3i' N., 7°o6'W., 2465 m., -f °. 1 spec. ($ ), 5111m. As the siDecimen was not dissected I can below only give such details as may be seen without dissection. Head as long as first mesosome segment, lateral lobes rounded triangular. Eyes could not be found. Ant. 1 has flagellum somewhat longer than peduncle, 9-articulate; acces- sory flagellum half as long as flagellum, 4-articulate. Ant. 2 not longer than ant. 1, flagellum 9-articulate. Kpistomal plate not projecting in front of upper lip, but very large. Coxal plates of pereiopoda seem to be of the usual shape. P. 1 has carpus and metacarpus of equal length, metacarpus obli- quely truncate. P. 2 rather robust, carpus abt. i73 time as long as metacarpus. P. 4 with c
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