PAGETINIDAE 131 



Family PAGETINIDAE 



Barnard, 1931, p. 427. 



Rostrum absent. Eyes present. Body moderately compressed, dorsally rounded. 

 Pleon segments 5 and 6 coalesced. Side-plates shallow. Telson short, entire. Antennae 

 short, 1 st without accessory flagellum. Mandible without molar. Lower lip without 

 inner lobes, outer lobes widely separated, mandibular processes blunt. Maxilla 1, palp 

 reduced, inner lobe ? absent. Maxilliped, outer plate short, inner plates obsolete. 

 Gnathopods 1 and 2 subchelate. Peraeopods 1-5 alike, 3-5 not much longer than the 

 others, 2nd joint in peraeopod 5 moderately expanded. Peduncles of pleopods moder- 

 ately long. Uropods 1 and 2 biramous ; uropod 3 uniramous. Branchial lamellae simple. 



Remarks. The peculiar little Amphipod described below conflicts in one character 

 or another with the definition of every family. The shallow side-plates, lower lip with 

 its widely separated outer lobes and obsolete inner lobes, and the maxilliped recall 

 certain Pardaliscids; the antennae, mandibles and the similarity to one another of the 

 peraeopods recall Lafystius. The reduction of the maxillary palp and the uniramous 

 character of uropod 3 are found in various families and are thus without significance. 

 Fusion of the 5th and 6th pleon segments occurs in the Atylidae and certain Podocerids. 



The name is taken from Mt Paget in South Georgia. 



Genus Pagetina, Brnrd. 

 Barnard, 1931, p. 427. 



With the above characters. 



Pagetina genarum, Brnrd. (Fig. 74). 

 Barnard, 1931, p. 427. 



Occurrence: 1. St. MS 22. South Georgia. 1 immat. $ 5-5 mm. Type $. 



2. St. 42. South Georgia. 1 c? 5 mm. Type <$. 



3. St. 45. South Georgia. 1 <$ 5 mm. 



Description. Rostrum obsolete. Antero-lateral angle of head rounded, forming a 

 deep cheek. Eyes lateral, small, circular. Back rounded, smooth. Side-plates shallow, 



1 subtriangular, rounded in front, nearly straight behind, postero-inferior angle acute, 



2 and 3 similar but longer, hind margins straight or feebly excavate, postero-inferior 

 angles rounded-quadrate, 5 and 6 feebly bilobed, 7 shorter than any of the others, 

 ovoid. Postero-inferior angle of pleon segment 2, quadrate, of 3 slightly produced in an 

 acute point. Segments 5 and 6 fused. Telson oval, entire. 



Antenna 1 short, 1st joint stout, flagellum 5-jointed, with sensory filaments, no 

 accessory flagellum. Antenna 2 shorter than antenna 1, slender, flagellum 3-jointed. 



Mandible, cutting-edge 4-dentate, secondary cutting-plate feeble, spine-row of three 

 spines, no molar, palp well developed, 2nd and 3rd joints subequal. Lower lip without 

 inner lobes, mandibular processes blunt. Maxilla 1 , outer lobe ovate, tipped with about 

 six spine-setae, inner lobe not observed, probably absent, palp short, 1 -jointed, tipped 



17-2 



