88 DISCOVERY REPORTS 



pushed forward into close juxtaposition with bases of ist antennae. Side-plates 1-4 

 much deeper than their segments, sloping well forwards, 1-3 narrow oblong, 1 with a 

 denticle on postero-inferior angle, and a fan of plumose setae on antero-inferior corner, 

 lower margins of 1-4 with scattered plumose setae; 4 much deeper than long, oblique, 

 lower margin evenly convex. Pleon segment 3 with posterior margin bisinuate, the 

 postero-inferior angle produced in an acute point. Telson ovate, longer than broad, cleft 

 almost to base, lobes contiguous, each with one apical spine and another submarginal 

 in distal half. 



Antenna 1 very short, extending scarcely beyond middle of 4th joint of antenna 2, 

 flagellum 2-jointed in juvenile and3\3-jointed in adult?, with plumose setae. Antenna 2 

 extending back to about 4th peraeon segment, 4th and 5th joints subequal, flagellum 

 4-jointed, shorter than 5th peduncular joint, each joint widening distally and bearing 

 two long setae. Mandibular palp slender, 3rd joint half length of 2nd. 



Peraeopods 1 and 2 similar except for the strong fringe of plumose setae on hind 

 margin in peraeopod 2, 4th joint slender, not strongly expanded. Peraeopods 3 and 4, 

 2nd joint obliquely ovate in peraeopod 3, subcircular in peraeopod 4, 5th joint with 

 strong marginal spines only. Peraeopod 5, 2nd joint strongly lobed postero-inferiorly, 

 the plumose seta continued round on to margin facing 3rd joint, inner surface also with 

 plumose setae, 5th joint not very stout, 6th slightly narrower, linear, dactyl as long as 

 6th joint, slender, with one long and one short seta on apex. 



Uropod 2, outer ramus with two long spines near apex. Uropod 3, rami lanceolate. 



Branchial lamellae simple. 



Genus Haploops, Lilj. 

 Stebbing, 1906, pp. 116, 722. 



Chevreux, 1908 {Bull. Inst, ocean. Monaco, no. 117), p. 6. 

 Stephensen, 1925, p. 150. 



The species described below is a true Haploops except as regards the 5th peraeopod. 

 I think this divergence from the generic diagnosis scarcely calls for a new genus. The 

 internal position of the lower pair of corneal lenses, similar to that in A. hemicryptops, 

 is not found apparently in the other species. 



Haploops securiger, Brnrd. (Fig. 42). 

 Barnard, 1931, p. 426. 



Occurrence: 1. St. 27. South Georgia. 4 SS 26-37 mm., 13 immat. 99 20-26 mm. 



2. St. 42. South Georgia. 2 <$<$ 30 and 35 mm., 4 immat. 99 21-27 mm. 



3. St. 123. South Georgia. 2 S3 27 and 36 mm., 3 99 33-35 mm., 1 ovig. 9 36 mm., 

 1 juv. 14 mm. Types. 



4. St. 140. South Georgia. 4 99 16-20 mm. 



5. St. 144. South Georgia. 1 ovig. 9 38 mm., 1 juv. 14-5 mm. 



6. St. 146. South Georgia. 11 $$ 27-32 mm., 10 99 27-32 mm. (1 ovig. ova 2 mm. 

 in diameter). 



7. St. 153. South Georgia. 2 $<$ 33 mm., 10 99 21-34 mm., 9 juv. 14-20 mm. 



8. St. 170. South Shetlands. 1 <J 30 mm., 3 99 30-31 mm., 2 juv. 16 and 20 mm. 



9. St. WS 33. South Georgia. 1 juv. 9-5 mm. 



