. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 24 CRUSTACEA MALACOSTRACA VIII IAMPHIPODA IVI. Fig. 16. Eurystheus abyssalis $. dorsolateral teeth; uros. segment 2 with one pair of medio-dorsal teeth and one pair of dorsal spines. Uropod 1, rami in length somewhat equal to peduncle. Uropod 2, rami somewhat longer than peduncle; inner ramus somewhat longer than outer. Uropod 3, rami in length nearly equal to peduncle, apically tapering. Telson about as broad as it is long, with edges almost parallel, but with apex triangular, and with a
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 24 CRUSTACEA MALACOSTRACA VIII IAMPHIPODA IVI. Fig. 16. Eurystheus abyssalis $. dorsolateral teeth; uros. segment 2 with one pair of medio-dorsal teeth and one pair of dorsal spines. Uropod 1, rami in length somewhat equal to peduncle. Uropod 2, rami somewhat longer than peduncle; inner ramus somewhat longer than outer. Uropod 3, rami in length nearly equal to peduncle, apically tapering. Telson about as broad as it is long, with edges almost parallel, but with apex triangular, and with a pair of dorsal spines, but no hairs. Affinities. The present species is characterized mainly by the hand of pereiopod 2, and by the presence of teeth on the urosome segments, viz., 3 on segment 1 and 2 on segment 2. A few species have pereiopod 2 not very different from the present species, but with urosome segments dorsally smooth. They are as follows: E. enrypodii Barnard, Discovery Report, vol. 5, 1932, p. 231, fig. (Falklands). Differs in having defining angle of palm in pereiopod 2 minute crenulated and rounded. ?£. scissimanus Barnard, Ann. S. Afr. Mus., vol. 20, 1925, p. 361, pi. 34 fig. 15 (South Africa, 230 m). Several other species have, like these, two teeth on palm of pereiopod 2^, but shape and size of the two teeth are rather different from those of E. abyssalis. The following species have dorsal teeth on urosome segments 1 and 2: E. anomalus Chevreux, Bull. Soc. Zool. France, vol. 50, 1925, p. 381 (Senegal). 1 + 1 teeth1). E. crassipes (Haswell) Stebbing. Tierwelt. vol. 21, 1906, p. 612 (East Australia). 3 + 0 teeth1). E. dentatus (Chevreux). Gammaropsis dentata Chevreux, Res. Camp. Sci. Monaco, vol. 16, 1900, p. 93, pi. 12 fig. 1 (Azores). 3 + 2 teeth. Mil teeth = 1 tooth mi urosome segment 1. 1 tooth on seg- ment 2. - 3- it teeth = 3 teeth on urosome segment 1. 0 mi seg- ment 2, etc. E. dimorphus Barnard, Discovery Rep., vol. 5, 1932, p. 244, figs. (South Geor
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