PALAEMON (KUPALAEMON) LENZII. 229 
shows its greatest diameter at one-fourth of its length 
from the apex, while this greatest diameter is about one- 
fifth the length of the joint. The length of the carpus is 
in proportion to the length of the merus about as 14: 11; 
the carpus grows slowly thicker to the distal end and is 
6-times or almost 6-times as long as thick near the propodal 
articulation. The chela is about twice as long as the merus, 
while the palm is usually a trifle shorter than the 
carpus, in the larger left leg of the largest male, however, 
a trifle longer than it. The palm, which near the carpal 
articulation is not wider than the carpus, but even a 
trifle less wide, is about 6-times as long as wide and 
usually appears, at the anterior fourth of its length, slightly 
less wide than near the carpal articulation and near that 
of the fingers; the palm appears almost cylindrical, though 
it is in the middle, in all the specimens, a trifle less thick 
than wide. When looked at from the outer- or from the 
inner side, the chela proves to decrease regularly in thickness 
from the carpal articulation to the tips of the fingers, like 
in other species. The fingers that measure a little more 
than two-thirds the length of the palm, are slightly 
turned inward, so that the inner border of the chela 
appears slightly concave at their articulation with the 
palm. The fingers shut together, except along the toothed 
part, while the tips are crossing; they show nearly the 
same width along their whole length to near the tips. 
The toothing of the fingers is quite the same as in 
Pal. dux, each finger being armed with 3 teeth, but I 
wish to observe that in the largest specimen the immobile 
finger of the left leg shows the trace of a 4th tooth between 
the 1st and the 2nd. 
The second legs are covered with small spinules, though 
not very thickly. On the inner and lower side of the meri 
these spinules are larger than on the upper side and on 
the outer face they are almost wanting at all. The carpal 
joints are everywhere beset with spinules, which however, 
like on the meri, are larger and less numerous on the 
Notes from the Leyden Museum, Vol. X XXIII. 
