147 
mentioned as discovered and described by Croneberg 
on the chele of Chernes. The real tactile hairs, over- 
looked by Gaubert, appear in Andr. australis less 
numerously and are less easily found than in Pand. 
cyaneus. In this last species I have found 10 such 
sense-hairs situated irregularly in a row on the im- 
movable finger in a little distance from the outer margin 
of the upper side, 2 on the same finger near the inner 
margin of the upper side and 2 on the lower side near 
the inner margin; on the outside of the hand near the 
insertion of the movable finger 2 hairs above, 2 below 
and further back on the outside 1 hair; on the lower 
side 1 hair a little out on the basis of the immovable 
finger, near the basis of the hand on the outside and 
chiefly on the upper side altogether 6 hairs in an irre- 
gular transverse row — in all 26 on this, the 5th, joint 
of the maxillary palpi. On the movable finger I have 
found none; on the 4th joint of the palpi, however, all 
in all 17 hairs on the upper side and on the upper part 
of the outside and the inside, and finally 3 hairs at the 
basis of the 3d joint. The single hairs are long, but 
are easily distinguishable from the surrounding, ordinary 
setee, being much finer than these in proportion to their 
length, and because their real insertion cannot be seen, 
as they disappear through a comparatively large, circular 
aperture, which they cannot fill by far. In a transverse 
section this aperture is seen leading into a cave, much 
wider than its exterior outlet, and on the bottom of 
this cave the insertion of the hair is seen. ‘The trans- 
verse section shows also other peculiarities in the shape 
of the surrounding chitine, and reminds much of »poil 
a chapelets«, exhibited by Wagner (op. cit. p. 125), but still 
there are several essential differences, of wich I shall 
particularly point out that the exterior wall of the 
cave does not rise as a semi-globular eminence, but is 
10* 
