546 DR. J. G. DE MAN ON CRUSTACEANS | Dec. 12, 
tooth. The short flagellum of the internal antenne, which is 
just as long as their peduncle, is serrulate internally, and coalesced 
for a very short distance, 7. e. for } of its length, with the outer 
flagellum. 
The legs of the first pair reach with their chele beyond the 
antennal scales; the chela is @ litile more than half as long as the 
carpus. 
The legs of the 2nd pair (figs. 8 and 9) ave wnequal, the left 
being a little larger than the other. The left leg (fig. 8), which 
is somewhat shorter than the body, projects more than half 
the carpus beyond the antennal scales. he cylindrical merus, 
that slightly thickens distally, is fowr times as long as thick. 
The carpus, which is a little shorter than the merus, has a rather 
stout, conical shape; it thickens considerably towards the distal 
end, appearing here more than twice as thick as at its base, when 
looked at from above, and its width at the distal end measures 
two-fifths of its length. The chela issomewhat longer than merus 
and carpus taken together. The palm is nearly once and a half 
as long as the carpus, and one-fourth longer than the fingers, which 
are a little curved inward, so that the inner border of the chela 
appears somewhat concave; the palm, distinctly broader than the 
carpus, is somewhat broader than thick, though but very little, the 
breadth in the middle being in proportion to its thickness as 
15:13, so that it appears almost cylindrical. About at one-third 
of its length from the articulation the immobile finger is armed 
with a conical tooth (fig. 10), half as high as the finger is broad 
at this place; behind it is seen a smaller rounded tooth and, 
between the latter and the articulation, four or five extremely 
small and low rounded teeth. The dactylus appears, at its base, 
a little broader than the fixed finger (fig. 8), and is armed, just 
in the middle, with a slightly curved, conical tooth, which is a 
little larger than the foremost tooth. of the index; opposite to it 
on the fixed finger is a small notch (fig. 10), that fits the 
tooth. Between this tooth and the articulation there are still 
five or six, much smaller, obtuse, somewhat unequal teeth. The 
tapering fingers therefore do not shut close together ; between 
the foremost teeth and the tip the cutting-edge is sharp. The 
joints of this leg are everywhere covered with innumerable minute, 
sharp spinules, except on the usual, naked lines; these spinules 
are more crowded and a little larger on the outer and on the 
inner border of the palm and near the finger-cleft on the upper 
surface, whereas they are less numerous on the rest of the upper 
and on the lower surfaces. They are few in number on both sides 
of the fixed finger; on the outer margin of this finger they are 
also few in number, but larger than on the inner border of the 
palm. The outer side of the dactylus is thickly beset with 
slenderer, larger spinules, the sharp tip of which is curved 
upward, whereas the inner part of the upper and lower surface 
is nearly smooth. A few microscopical hairs occur on the outer 
and inner borders of the chela and of the other joints. 
