i 2 8 DISCOVERY REPORTS 



plates 5 and 6 are likewise grooved, but their shape is different, as is also that of side- 

 plate 4. The antero-inferior angle of the head is acute. The rudimentary 4th palpal 

 joint of the maxilliped is present, but very minute. 



The colour of the smaller specimen is given as "deep bluish-violet mottled pos- 

 teriorly with pale spots. Eyes pink. Antennae white; legs white except for basal seg- 

 ments [= joints]". As preserved the specimen is dull orange, eyes darker. The colour 

 of the larger specimen presents a marked contrast, being " pure white with pink eyes". 

 There are no structural differences. Cunningham gave the colour as purplish. 



Distribution. Elizabeth Island (in Magellan Strait); Falkland Islands. 



Genus Panoploea, Thorns. 



Stebbing, 1906, p. 211 ; 1910, p. 585. 

 Chevreux, 1913, p. 114. 

 Stephensen, 1927, p. 313. 



Panoploea joubini, Chevr. 



Chevreux, 1913, p. 114, figs. 19-21. 

 Occurrence: St. 195. South Shetlands. 1 ? 7 mm. 



Remarks. The lower margins of all the peraeon segments are imbricate, forming a 

 lateral keel. No median keel or tooth between base of rostrum and epistome. 



The colour is given as "brown and semitransparent. A large milk-white dorsal patch 

 on thoracic segments 3-7, extending on to coxopodites. Abdominal segments 2 and 3 

 closely dotted with white dorsally and dorso-laterally. Eyes bright scarlet". 



Distribution. Off Adelaide Island, 250 m. 



Panoploea macrocystidis, n.sp. (Fig. 72). 



Occurrence: St. 53. Falklands. 1 ovig. $ 8 mm. from kelp root. 



Description. Rostrum stout, slightly deflexed; a small sharp tooth at its base be- 

 tween bases of 1st antennae. Anterior margin of head slightly angular below eye; 

 antero-inferior angle produced in an acute curved point. Peraeon segments 1-6 

 dorsally smooth, segment 7 with a pair of pointed processes; postero-inferior angles of 

 segments 1-4 rounded, of segments 5-7 each produced in a pointed process; lower 

 margins of all segments imbricate, forming a lateral keel. Side-plate 1 subtriangular, 

 narrowed below, 2 and 3 oblong, 5-7 each with postero-inferior angle pointed ; 5 with 

 a groove, which however scarcely receives the posterior process of side-plate 4, but is 

 for the purpose of allowing movement to the 2nd joint of peraeopod 3 ; 6 also has a 

 short groove for the reception of the 2nd joint of peraeopod 4. Pleon segments 1 and 2 

 each with a pair of dorsal processes ; segments 1-3 with a medio-dorsal keel which ends 

 in a backwardly directed tooth ; on segment 3 its profile is sinuous ; segment 4 with a 

 shallow transverse depression; 5 and 6 smooth, the dorso-lateral keels on the latter 

 slight and ending bluntly. Postero-lateral margins of segments 1-3 with a tooth, that 

 on segment 3 longest and upturned; postero-inferior angle of segment 1 rounded, of 



