LYSIANASSIDAE 47 



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Genus Uristes, Da/ia. 



Stebbing, 1906, p. 63. 



Barnard, 1916, p. 126; 1925, p. 333. 



Schellenberg, 1931, p. 26. 



Uristes gigas, Dana (Fig. 11). 



Bate, 1862, p. 89, pi. xiv, fig. 8 (after Dana). 



Stebbing, 1888, p. 617, pi. vi (Tryphosa antennipotens); 1906, p. 64. 



Walker, 1907, p. 16. 



Occurrence: 1. St. 140. South Georgia. 1 S 21 mm. 



2. St. 144. South Georgia. 1 juv. 10 mm. 



3. St. 156. South Georgia. 1 $ 19 mm. 



4. St. 159. South Georgia. 1 c? 18 mm. 



5. St. 175. South Shetlands. 3 $<$ 2,1, 23, 26 mm., 1 $ 27 mm., 4 ovig. ?? 26- 

 27 mm. 



6. St. WS 53. South Georgia. 2 <$<$ 15-16 mm., 1 $ 15 mm. 



Remarks. These specimens differ but little from Stebbing's description and figures. 

 The eyes are very indistinct, but are reni- 

 form, widening below; Stebbing's figure 

 shows punctae over the whole head, but 

 the position of the eyes is best seen by the 

 absence of these punctae. The whole in- 

 tegument is sparsely punctate. 



The epistome and upper lip form nearly 

 a straight line, with a notch at their 



junction ; neither is at all prominent. The Fig. 11. Uristes gigas, Dana. Dorsal profiles of pleon 



palp of maxilla 1 , when flattened, is a little segment 4 to show variation. 



broader than in Stebbing's figure. 



Gnathopod 1 distinctly subchelate, thus conflicting with Stebbing's key (1906, p. 11) 

 and diagnosis, palm better developed than in Stebbing's figure which is perhaps not 

 quite a true profile, the defining angle with two strong spines. 



A single accessory branchia on both segments 5 and 6. 



No sexual differences in the length of the antennae. 



Note 129 gives the colour of the specimens from St. 175 as: "creamy buff, dorsally 

 with a narrow orange-red transverse band at posterior end of each segment of thorax 

 and abdomen, liver visible as a bluish mass; eyes deep crimson". 



The capture by the ' William Scoresby ' of both sexes of this species in a night haul 

 near the surface is interesting. 



Distribution. Antarctic Seas (Dana) ; Heard Island, 274 m. ; Ross Sea. 



Genus Cheirimedon, Stebb. 

 Stebbing, 1906, pp. 66, 720. 

 Schellenberg, 1926, p. 262. 



The original definition of this genus has been widened to include femoratus and 



fougneri, in which the mandibular palp arises immediately behind the molar, and the 



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