192 Mr. R. I. Pocock on new 
of the mandible at the base of the fang stiff and spiniform ; 
external edge of fang not serrulate. 
Mawille furnished with a long distal apophysis; a few 
long slender spinules interraixed with the hairs of the scopula 
extending along its anterior edge. 
Labium large, conical, its width at the base equal to its 
length, armed only at the apex with spinules; united with 
the sternum, but separated from it by a conspicuous, trans- 
verse, smooth, pale, shallow depression. 
Sternum cordiform, but less narrowed in front than in 
Paramigas, its width between the coxe of first legs greater 
than half its greatest width between the coxe of the second 
and third pairs. 'T'wo very conspicuous scars *, consisting of 
short crescentic impressions in the anterior half of the sternum, 
about as distant from each other as each is from the edge; 
the rest of the impressions obsolete. 
Palpi and anterior two pairs of legs as in Paramigas, but 
not woolly below, and the tibia of the palp with several 
spines on its inner edge ; the third and fourth pairs, however, 
much stronger than the first and second, as in Pachylomerus, 
Idiops, &e.; femur of the third almost wholly membranous 
below, its tibia deeply impressed at the base and shorter 
than the patella when measured along the upper surface ; 
claws of first two pairs of legs armed, as in Paramigas, with 
one large and one or two smaller teeth; those of the third 
and fourth pairs armed with one enormous tooth, which is 
as large almost as the curved half of the principal claw ; 
anterior claw of the fourth smaller than the posterior and 
directed forwards ; the inferior claw on the third leg small. 
Abdomen and spinners as in Paramigas. 
Thyropeus mirandus, sp.n. (Pl. V. figs. 2-2 6.) 
Colour. Carapace olive-brown; legs blacker; anterior 
coxe and anterior part of sternum deep brown, posterior part 
of sternum and posterior cox# much paler; abdomen brownish 
rey. 
: Measurements in millimetres.—Total length of trunk 43, 
of carapace 18; width of carapace 16°5; distance of fovea 
from anterior border 11 ; width of ocular area 8-5; length of 
clypeus 3; length of palp 20, of first leg 30, of second 28, of 
third 28, of fourth 35. 
* Typically, or, rather, primitively, in spiders of this group there seem 
to have been four pairs of sternal scars placed close to the cox of the 
palpi and first three pairs of legs. Those opposite the palpi become the 
groove between the labium and the sternum. 
