14 
IVAR TRÄGÅRDH, 
(Schwed. Siidpolar-Exp. 
outer upper side near the joint provided with a complicated projection, directed obli- 
quely backwards (Text-figs 24 and 25). Legs III and IV do not exhibit any peculiarities. 
The arnbulacres are of the shape, typical for the genus (Text-figs 20 & 21). 
The claws are comparatively smaller and the secondary claws larger than for in- 
stance in H. salinus Lab. 
The epistoma (Text-fig. 19) triangular, with long, sharply pointed, median 
mucro; the edges are provided with about 10 pairs of small, sharp teeth. 
The hypostoma (Text-fig. 23); the anterior pair of hypostomatic hairs larger 
than the others. The maxillary lobes simple, rather long and narrow, curved in- 
wards. Styli present, small, directed nearly perpendicularly inwards. 
The mandibles (PI. II, fig. 18). The lower and the upper jaw of the chela of 
the same length and width; the lower one with one, the upper one with two sharp, 
backwardly directed teeth, beside the terminal ones. Calcar mandibidi of even 
length throughout, curved slightly upwards, of exactly the same length as the chela. 
The maxillary palps (Text-fig. 18) with 5 free joints; the first one narrow, 
twice as long as broad, on the ventral side with two hairs inserted in very low 
projections; the second, third and fourth joints of equal length, but the second broader, 
nearly as broad as long; the third joint on the inner side provided with a strong, 
serrated bristle; terminal joint small, only half as long and broad as the fourth, 
with rounded top and richly provided with hairs. 
Female. 
Dorsal side like that of the male. 
Ventral side (PI. Ill, fig. 2). Tritosternum shaped like that of the male. One 
pair of jugular shields , a little broader than those of the male and with the thick 
anterior edges falling off more abruptly towards the middle; without hairs. 
Sternal shield short, extending backwards as far as to the middle of coxae III, 
shorter than the genital shield. The front margin square, the antero-lateral angles 
very long, extending in front of coxae II as far as to their outer side; the hind 
margin with a deep, semi-circular excavation. 4 pairs of pointed bristles, much 
larger than those of the male; the first one situated near the front margin, directed 
backwards; the others situated near the sides and directed centripetally (towards 
the middle), the second at a level with the middle af coxæ II, the third in the angle 
between coxæ II and III, and the last pair in the postero-lateral angles of the shield. 
Parallel with the anterior margin of the sternal shield is a pair of light spots, 
which, as in the case of the male, I am inclined to interpret as an indication of a 
second pair of jugular shields. 
The genital shield is large, extending forwards nearly as far as to the front 
margin of coxae III and backwards a little beyond coxæ IV ; the front margin is 
semi-circular, the sides are subparallel, slightly concave; the hind margin almost 
