6l2 



IVAR TRAGArDH 



Mandibles (fig. 137) with very short chela; upper jaw longer and nar- 

 rower than lower jaw, with powerful terminal tooth and further back a small 

 tooth on a level with pilus dentarius. Lower jaw with ventral margin thickened to 

 a strong ridge which bends upwards at the base of the appendage in order to 

 support it; it has two sharp teeth. The appendage is very long, more than 

 twice as long as the chela, shaped as a thin, hyalin blade, which is curved 

 downwards at a right angle in front of the middle, where it is considerably 

 widened, the whole structure most vividly resembling the beak of a bird. 



The palps (fig. 135) are slender; the ist joint is more than thrice as long 

 as it is wide, curved upwards and with two hairs in the distal half, on the 



Figs. 151 — 133. Pachylcelaps haviifer n. sp. cT. 



131. Leg II (ambulacre missing). 132. Leg II (ambulacre missing). 133. Sternal shield 



(hairs missing). 



inner side; 2nd joint slightly shorter and wider than the ist, slightly curved, 

 with one stout, short bristle distslly on the inner side; 3rd joint shorter than 

 the 2nd, straight, with two stout, short, perpendicular bristles close together 

 near the middle, on the inner side; 4th joint clavate; 5th joint very small, oval 

 in outline, articulated in a deep excavation at the inner side of the top of 

 joint 4, with large bifurcate bristle at the base. 



Maxillae (fig. 34). The maxillary lobes are very long and slender and 

 inserted on narrow projections, cut off obliquely at the top and carrying three 

 pairs of the hypostomatic hairs. 



The legs. Legs I (fig. 132) very slender, with coxa constricted in the 

 middle and bent upwards, with blunt tooth in the middle of ventral edge; 

 femur with distinct basifemur, clubshaped; genu as long as femur, slightly 

 curved; tibia slender, slightly constricted near the base, where it is bent a little 



