20 
IVAR TRÄGARDH, 
(Schwed. Siidpolar-Exp. 
What Trouessart considers to be the third, ventral lobe of the »collerette» is 
in reality the median, basal part of the maxillae, which is demarcated from the end 
of the maxillae by a line or small fold. 1 ) 
The maxillce (Text-fig. 34) are fused together by z / 3 of their 
length; their free ends are short, conical, obliquely truncated at 
the top; one pair of feathered hairs and, near the top, one pair 
of very minute, perpendicular hairs. 
Céphalothorax (PL 1 , fig. 9). Near the front margin, in the 
middle, are two horseshoe-shaped crests, with the concave side 
turned backward. The cephalothoracic shield is separated from 
the abdominal one by a rather deep groove, the ends of which 
are curved forward; the edges of the shields bordering the groove 
are thickened and on the cephalothoracic side regularly undulated. 
There are three pairs of hairs on the céphalothorax; one pair of 
feathered hairs in front of the anterior crests; another pair, larger, 
near the lateral horns of the groove and the third pair, which is bare, is inserted 
in deep pores near the centre of the shield. The third pair seems to be sense 
hairs and homologuous with the bare shoulder hairs of T. arcticus Tgdh which latter 
also are inserted in deep pores. Abdomen; on the median shield near the lateral 
sides 7 pairs of feathered hairs. 
Locality : No. 1, 2 and 5. 
Fig. 34. Rostrum and 
left palp, of Tedopen- 
thalodes villosus (Trt) 
ventral view. 207 x . 
Rhagïdia Thorell. 
1871. R/iagidia Thorell. 
1886. Nörneria R. Canestrini. 
9. Rhagidia megalochela nov. spec. 
(PI. II, figs, il and 14, text-figs. 37, 40, 46 and 47.) 
Length. 1,1 mm. 
General shape like that of R. gigas R. Can. 
The mandibles (PL II, fig. 14, text-fig. 37). 
The chela is enormously developed, attaining a little more than x /* of the length 
of the entire mandible. The lower jaw is strongly curved upwards for the greater 
part of its length and narrows gradually from the base to the tip; the condylus is 
narrow and does not widen at a right angle with the jaw as in R. gelida and R. 
*) This basal part has been cut clean off during the preparation while on the dorsal side the 3-lobated 
epirostral plate remained; thus the median lobe, the outline of which is nearly parallel with that of the 
basal part of the maxillae, was exactly covered by the latter and consequently if the tube of the micro- 
scope is slightly lowered showed through and caused T.’s mistake. As I have been able to see the spe- 
cimen from which T.’s figure is made, there can be no mistake about the above explanation. 
