. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 92 DISCOVERY REPORTS Antenna i, flagellum 6-jointed, accessory flagellum 2-jointed, the 2nd joint only half as long as the 1st. Antenna 2, 4th and 5th joints subequal, upper margins finely setose, flagellum in $ 2-jointed, in S very elongate, about 46-jointed, with a calceolus on each of the basal 4-5 joints and thereafter on every alternate joint. Mouth-parts normal. Gnathopod 1 and 2 as in elegans, but palm not distinct from hind margin of hand. Peraeopods 1 and 2 as in elegans. Peraeopod 3, 2
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 92 DISCOVERY REPORTS Antenna i, flagellum 6-jointed, accessory flagellum 2-jointed, the 2nd joint only half as long as the 1st. Antenna 2, 4th and 5th joints subequal, upper margins finely setose, flagellum in $ 2-jointed, in S very elongate, about 46-jointed, with a calceolus on each of the basal 4-5 joints and thereafter on every alternate joint. Mouth-parts normal. Gnathopod 1 and 2 as in elegans, but palm not distinct from hind margin of hand. Peraeopods 1 and 2 as in elegans. Peraeopod 3, 2nd joint oblong, anterior margin strongly sinuous, posterior margin nearly straight, feebly crenulate, following joints moderately expanded. Peraeopod 4, 2nd joint rather elongate oblong, anterior margin feebly sinuous, posterior margin straight, with rounded lobe below not extending below end of 3rd joint, a row of plumose setae on inside surface of lobe. Peraeopod 5, 2nd joint oval, posterior margin smooth, with a few setules, lower lobe broadly rounded, not projecting below end of 3rd Fig. 44. Urothoe fakata, Schell. a. Head, with antennae 1 and 2, accessory flagellum and three flagellar joints of antenna 2 further enlarged, b. Pleon segment 3. c. Gnathopod 1, with distal margin of 5th joint further enlarged, d. Gnathopod 2. e. Peraeopod 3. /. Peraeopod 4 (inner surface), g. Peraeopod 5. Uropods 1-3 as in elegans; rami of uropods 1 and 2 each with a subapical spine. Remarks. This is the first species of Urothoe to be recorded from the sub-Antarctic or Antarctic region, or indeed, barring the South African record (Barnard, 1916, p. 143), from the southern hemisphere. The gibbous pleon segment 3, the large hook on the postero-inferior angle of pleon segment 3, and the hooked inferior angle of the head are distinctive; dentata, Schell., has only a small hook on pleon segment 3. Distribution. South of La Plata River mouth. Genus Urothoides, Stebb. Stebbing, 1906, p. 132.
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