8 AURIVILLIUS, A NEW GENUS OF HARPACTICIDA. 
in the upper inner corner, and of a broad middle joint which 
constitutes with the claw-like, terminal joint a chelate, pre- 
hensile hand. The margin of the hand, directed towards 
the claw, however, is not concave, but almost straight. 
The claw has in the inner margin a small notch, bearing a 
short seta. 
The first pair of feet (P1. I. Fig. 1.) are highly developed clas- 
ping organs, twice as long as the following pairs of feet, 
which do not reach farther than to the end of the second basal 
joint of the first pair. This first pair of feet destitute! of 
ciliated sete. Basal joints of equal breadth throughout, more 
than twice as long as broad. Outer branch only half as long 
as the inner and consisting of three joints. First joint short, 
bearing a spine at its outer margin; second joint fully as 
long as the two others together and armed with a spine, 
similar to that of the first, and besides with some small spines 
on the outer margin; last joint as short as the first and bea- 
ring at its apex two claws af unequal length, bent out- 
wards and having two sete at their base First joint of the 
inner branch longer than the whole outer branch and about 
six times as long as the two other joints together, exclusive 
of the claws; second joint very short and destitute of all 
sorts of appendages, as well as the first; third joint bearing 
two claws of unequal length and much curved outwards. The 
peculiar glenoid surface of articulation between the first and 
second joints intimates a great mobility of the claws. 
The following three pairs of feet resemble each other very 
much as to the essentials of their structure, but it is, how- 
ever, easy to distinguish them from each other, and they. 
differ also in the two sexes. 'The basal part of all pairs short 
and broad, consisting of two pieces, immoveably joined and 
in the posterior pairs not clearly distinguished from each 
other. 
The outer branch of second pair of feet (P1. II. Fig. 1. 2.) 
three-jointed. First joint the longest and bearing a spine 
at the upper part of the outer margin; second joint bearing 
also a spine on the outer margin besides a long ciliated seta 
in the middle of the inner margin; third joint having three 
spines on the outer margin, two ciliated sete at the apex 
itself and two similar ones on the inner margin. Inner 
branch two-jointed and so short as not to reach farther than 
