IOO DISCOVERY REPORTS 



flagellum, which seems more reasonable. I have illustrated what appears to be the very 

 short true ist joint. 



Genus Heterophoxus, Shoem. 



Shoemaker, 1925, p. 22. 

 Barnard, 1930, p. 333. 

 Schellenberg, 193 1, p. 73. 



The great development of the basal process on antenna 2 seems to be peculiar to this 

 genus and Harpinia. 



Heterophoxus videns, Brnrd. 



Chilton, 1912, p. 477 {obtusifrons, non Stebb.). 

 Barnard, 1930, p. 334, fig. 11. 

 Schellenberg, 193 1, p. 74, figs. 376, 38. 



Occurrence: 1. St. 27. South Georgia. 1 2 6 mm. 



2. St. 156. South Georgia. 1 <$ 6 mm. 



3. St. 195. South Shetlands. 8 22 4-5-6 mm. 



4. St. WS 25. South Georgia. 2 22 5-6 mm. 



Remarks. The basal ensiform process of antenna 2 was not mentioned in the original 

 description. This feature, the postero-inferior angle of pleon segment 3, and the villose 

 hind segments of the body constitute easy identity marks for this species. 



The absence of the antennal process in Stephensen's specimens from the Auckland 

 Islands (1927, p. 306, fig. 6) indicates a separate species; it is certainly not obtusifrons, 

 Stebb., apart from other considerations. 



Distribution. Ross Sea area, 82-457 m -*> South Orkney Islands. 



Heterophoxus trichosus, n.sp. (Fig. 50). 

 Occurrence :St. 175. South Shetlands. 1 2 12 mm. 



Description 2. Body dorsally rounded, 

 setose on the posterior peraeon segments 

 and on pleon segments 1-3 . Head with hood 

 apically rounded (cf . Harpinia plumosa , Sars, 

 pi. Hi). Eyes small, narrow oval, black. Side- 

 plate 4 with shallow but better marked 

 excavation than in pennatus Shoem. Pleon 

 segment 3 with postero-inferior angle pro- 

 duced in an upturned acute process. Telson 

 as in videns, Brnrd., with 2-3 setae on apex 

 of each lobe. 



Antenna 2 of the Harpinia type; basal 

 joint with curved ensiform process as in 

 pennatus, videns and Harpinia cariniceps. 



Fig. 50. Heterophoxus trichosus, n.sp. a. Pleon seg- 

 ments 3 and 4. h. Peraeopod 5. 



