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 joint. 



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. 



From the description of the species given below it will be seen that the differences 

 between this genus and Urothoe as set out in Stebbing's key (1906) do not apply. The 



