CRUSTACEA. 297 
lar tooth or spine is placed on the upper margin of the orbits 
in front of the eye-peduncle, is sharp and directed somewhat 
obliquely inward and forward (Fig. 4a), being separated by a 
concave emargination from the lateral margin of the front. 
Only one single type specimen of P. barbatus Heller is 
still preserved at the Museum of Vienna; it is a female, 
the left chelipede of which is wanting. A character of 
importance has neither been described nor figured by Heller. 
The outer margin of the chelaeis namelyarmed 
with several, eight to ten, sharp teeth, direc- 
ted distally, from the articulation of the wrist 
until the immobile finger. These teeth, as Koelbel 
informs me, are as distinctly developed and have the same 
form in the Vienna type specimen as in our species from 
Flores. The outer margin of the hands is somewhat arcuate. 
In the Vienna specimen, a fringe of long hairs 
is found on the outer margin and for a part 
also on the upper surface of the hand, by which 
the above-mentioned marginal teeth are enti- 
rely concealed. It is perhaps for that reason that Heller 
says: »die Scheere ist sehr flach mit scharfen Rändern”’, not 
describing the teeth. In the specimens from Flores the 
outer margin of the chelae is also hairy, but these hairs 
are very short, not longer than the teeth, so that the 
latter are not concealed by them. Koelbel is disposed 
to consider the stronger development of hairs on the hand 
of the Vienna species at most as a secondary sexual diffe- 
rence, because no other real differences are present. Two 
small sharp teeth are observed, both in the Flores and in 
the Vienna specimens, also on the inner margin of the 
palm, near the distal end, at a small distance from one 
another. The right chela is usually a little larger than the 
left. The carpopodite is armed at its anterior border with 
three or four (rarely five) very sharp, distinctly isolated 
teeth; so in one adult specimen (Fig. 4) the carpopodite 
of the right larger chelipede bears three, that of the smaller 
left four teeth, in another specimen the wrists of both 
Notes from the Leyden Museum, Vol. XV. 
