178 DISCOVERY REPORTS 



characteristic appearance; posterior margins of segments 5-7 faintly beaded between 

 the dorso-lateral and medio-dorsal keels. Lower margins of segments feebly nodulose 

 (obsolete in no. 1). Side-plate 4 deeper than long, antero-inferior angle rounded, 

 postero-inferior angle quadrate; side-plates 5 and 6 nodose. Pleon segments 1-4 

 dorsally carinate, like the peraeon with a dorso-lateral ridge, and laterally somewhat 

 irregularly and feebly nodulose ; carina on segment 4 acutely triangular ; segment 5 very 

 short; segment 6 with a medio-dorsal upstanding triangular tooth, and the lateral 

 margins produced backwards in acute lobes. Postero-inferior angle of pleon segment 3 

 produced in an acute upcurved hook; no angular projections on lateral margins above 

 the postero-inferior angles. 



Peraeopods 3 and 4, 2nd joints with an uncinate process on basal hind margin, beyond 

 which the outer and inner keels diverge, the former expanded and ending in a slightly 

 produced quadrate lobe, the latter scarcely expanded, lateral longitudinal keel running 

 to the lower margin of lobe of outer keel. Peraeopod 5, 2nd joint with hind margin 

 strongly expanded, the distal one-third semicircularly excised. 



Uropod 2, outer ramus two-thirds length of inner. 



Remarks. The larger specimen, no. 1, is less nodose than the two smaller ones (no. 2) 

 and but for the latter several of the less noticeable features would have been overlooked 

 or ignored. 



Walker, 1907, p. 26. 

 Barnard, 1930, p. 377. 



Genus Epimeriella, Wlkr. 



Epimeriella macronyx, Wlkr. (Plate I, fig. 3). 



Walker, 1907, p. 26, pi. ix, fig. 15. 

 Schellenberg, 1926, p. 344. 

 Barnard, 1930, p. 378. 



Occurrence: St. 162. South Orkneys. 1 $ 21 mm. 



Remarks. Side-plates 1-3 narrowly rounded or subacute below. The remarks on 

 the Terra Nova specimens apply here also. Sixth joint of peraeopods 3 and 4 equal to 

 the 2nd~4th joints together; dactyl two-thirds length of 6th joint. (The 6th joint is 

 drawn a little too short in the coloured figure here reproduced.) 



Distribution. McMurdo Sound, 5-10 fathoms and 0-350 m.; 'Gauss' winter 

 station, 385 m. 



Epimeriella walked, Brnrd. (Fig. no). 



Barnard, 1930, p. 380, figs. 40 c and 44. 



Occurrence: 1. St. 170. South Shetlands. 3 S3 "-13 mm., 25 $$ 14-18 mm. 

 2. St. 182. Palmer Archipelago. 1 ? 17 mm. 



Remarks. None of the specimens are fully mature, but they agree with the original 

 description except as regards gnathopods 1 and 2. The 6th joint has a distinct rounded 

 palm as in the embryo figured in fig. 44 c (1930), and is finely pectinate as in scabrosa 



