IVAR TRÄGÅRDH, 
12 
(Schwed. Südpolar-Exp. 
nor tibialis nor tarsalis; claws larger, caruncle bilobated, one pair of subunginal 
flips. 
Legs IV with long femur and tarsus; tarsus IV in the middle of the dorsal 
side with one long tactile hair. 
Epistoma (Text-fig. 16) triangular, with long, median mucro; the edges slightly 
concave with 12 — 14 pairs of small, sharp teeth Styli present, narrow and short. 
Hypostoma (Text-fig. 15); maxillary lobes 2-jointed, with broad basal joint, 
covered by the lateral edge of the maxillary plate; terminal joint with broad base; 
its inner (median) edge with a deep incision. 
The mandibles (PI. I, fig. 4) with rather broad chela; lower jaw a little shorter 
than the upper one and with the ventral edge more curved; sharp terminal tooth 
and one sharp tooth a little in front of the middle, behind this an incision and a high 
sharp edge; calcar mandibuli fused with the lower jaw with broad base, narrow, of 
even width throughout, exactly as long as the chela and curved upward and forward 
near the tip. The upper jaw with more straight dorsal edge, a little longer than 
the lower one, with one small subterminal tooth beside the terminal one and two 
larger teeth at regular intervals; between the subterminal and the first middle tooth 
several small teeth and the sense organ. 
The maxillary palps ; on the inner side of the third joint in the middle one large 
feathered bristle and more ventrally one curved bristle with flattened ventral edge. 
Locality: No. 12. One male. 
5. Hydrogamasus antarcticus nov. spec. 
(PI. II, figs 6, iS, 21. PL III, fig. 2. text-figs 18 — 25 . ) 
Male. Average length 0,65 mm, breadth o, 3 s mm. 
Female. » » 0,69 » » o, 4 » 
Male. Shape , colour and texture like that of H. salinus Lab. [= H. littoralis 
(G. R. Can.) Berl.]. Dorsal side covered by a single shield, provided with small, 
regularly placed hairs; near the hind margin two pairs of somewhat longer hairs. 
Ventral side. Tritosternum with narrow nearly cylindrical trunk, three times 
as long as broad; the feathered slips very narrow, three times as long as the trunk. 
Only one pair of jugular shields (Text-fig. 22), jugular shields narrow, triangular, 
with straight hind margin; the front margin from the median (inner) angle slightly 
rising for 2 / 3 of its length, from thence suddenly falling off; no hairs. 
Sternal shield ; instead of the usual 3 pairs of hairs it is provided with not less 
than 5 pairs, of which one is situated close to the anterior margin, halfway between 
the genital aperture and the antero -lateral angles; the other 4 pairs are all situated 
near the sides, one on the inner side of coxæ II on a level with their middle, two 
