604 IVAR TRAGARDH 
The specimens from Juan Fernandez differ from those previously recorded 
by the author from the Faroe-Islands and from the French caves, but not 
enough to warrant the establishing of a new variety. 
The mandibles of the male (fig. 109) differ in the following way. The 
lower jaw resembles in some respects that of the Faroe-specimens, in other the 
French specimens. The general shape is that of the latter in that it is not 
curved like a hook at the top but has a terminal tooth, the anterior edge of 
which forms a right angle with the longitudinal axis. But this tooth is double 
and clearly constricted at the base, 
and the dentition further backwards 
is that of Faroe-type, only the teeth 
are much bigger (compare TRAGARDH 
1931, figs. 8 and 9). The upper jaw 
has the same general shape as in the 
French specimens, but the rounded in- 
cision in front of pilus dentarius is 
deeper and the teeth further back- 
wards a little bigger. 
The legs II (fig. 110) resemble 
those of the typical variety as de- 
110 lineated by BERLESE. 

Figs, 109—110. Pergamasus crassipes (L.) var. : . , 
longicornis BERLESE. Loc.: Juan Fernandez, Masa 
109, Mandible ~. 110. Processitibiales of leg II o’. tierra. Among dry leaves. 
19. Gamasiphis uncifer n. sp. — Figs. 111—117. 
Amongst dry leaves mentioned above (p. 587) there were several speci 
mens of this species which were sufficiently well preserved to allow of a de- 
tailed description. 
Male. 
Length 800 », width 580 uw. 
Shape typical for the genus, with highly arched dorsal side. 
Colour chestnut-brown. 
Texture extremely finely scaly. 
Dorsal side covered by a single, highly arched shield which has about 
24 pairs of hairs, which have, however, nearly all fallen off. 
Ventral side (figs. 112 and 114). Jugular shields narrow, triangular, 
tapering towards the centre. Sternal shield narrowest between coxe II, ex- 
tending backwards to the level of the hind margin of coxz IV; anterior margin 
slightly excavate. Genital aperture large, on three sides surrounded by the 
sternal shield and covered by an oval plate slightly wider than it is long. Of 
the 5 pairs of sternal hairs one is placed near the anterior margin, a little 
nearer to the genital shield than to the lateral margin, the other four laterally, 
1] a little in front of the posterior margin of coxz II, III and IV near anterior 
