48 DISCOVERY REPORTS 



hand of gnathopod i is scarcely or not at all distally widened. These two species do not 

 run down to Cheirimedon in Stebbing's key (1906), but to Orchomenella or Orchomenopsis, 

 to which it must be confessed they are closely allied. 



Cheirimedon femoratus (Pfr.). 



Pfeffer, 1888, p. 93, pi. ii, fig. 2. 



Chevreux, 1906, p. 2, figs. 1-4; 1913, p. 92 (dentimanus). 



Chilton, 1912, p. 467. 



Occurrence: 1. St. 145. South Georgia. 2 $? 13-14111111. (the larger ovig.). 



2. St. 165. South Orkneys. 58 specimens 11-15 mm., inch ovig. $$ from stomach 

 of Notothenia. 



3. St. 173. South Shetlands. 17 $$ 9-10 mm., 8 $$ (3 ovig.) 11-13 mm. 



4. St. 174. South Shetlands. 6 $$11-13 mm. 



5. St. 179. Palmer Archipelago. A lot S3, ??» some ovig. and juv. 5-15 mm. 



6. St. 190. Palmer Archipelago. 4 $$ 10-12 mm. 



7. St. MS 67. South Georgia. 4 c?c? 9 mm. 



8. Deception Island, South Shetlands, 28. ii. 27. Found dead and parboiled on 

 beach by hot springs. 50 specimens 9-15 mm., a few <?c?and immat., but mostly $?. 



Remarks. The differences in the figures of the telson given by Pfeffer and Chevreux 

 may well be explained, as Chilton has done, by the fact that Pfeffer did not dissect the 

 only two specimens he had. 



A single accessory branchia on both segments 5 and 6. 



The two specimens from St. 145 are noticeable in having the produced point on the 

 postero-inferior angle of pleon segment 3, the carina on segment 4, and the epistome all 

 more prominent than in the typical form as illustrated by Chevreux. 



Distribution. South Georgia; South Orkneys; Palmer Archipelago. 



Genus Tryphosella, Bonnier. 

 Stebbing, 1906, pp. 67, 720. 



Tryphosella albina, n.sp. (Fig. 12). 



Cf. T.georgiana, Schell., 1931, p. 30, fig. 13. 

 Occurrence: St 170. South Shetlands. 1 <$ 11 mm. 



Description. Head with antero-lateral angle subacute, extending to end of 1st joint 

 of antenna 1. Eyes invisible. Side-plate 1 subtriangular, narrowed below. Pleon seg- 

 ment 3 with postero-inferior angle produced in a short subacute point, segment 4 with 

 an evenly rounded carina following the basal depression. Telson twice as long as basal 

 width, cleft nearly to base, the lobes not dehiscent, tapering, apically notched, with a 

 spinule in the notch. 



Antenna 1, 1st joint not apically produced over 2nd, 2nd and 3rd joints very short, 

 flagellum stout, 13 -jointed, 1st joint longest, setose, other joints broader than long, with 

 calceoli. Antenna 2, flagellum 13-14-jointed, calceoliferous. 



Epistome and upper lip forming a moderately arcuate curve, with a notch at their 



