228 PALAEMON (EUPALAEMON) LENZII. 
to its length than in the cotype of Pal. duz, and, while 
in this species the anterior pair of spinules is situated just 
behind the middle of the telson, it is placed in Pal. 
Lenzii immediately before the middle, and the posterior 
pair appears in the four specimens a little farther distant 
from the acute tip of the telson than from the anterior 
pair. Tip of the telson as in Pal. dux, but one observes 
10—12 feathered setae between the inner spines. 
The damaged, short antennular flagellum, which is also 
serrate, seems to agree with that of Pal. dur. The basal 
undivided part of the outer flagellum consists of 8 articles; 
the two distal articles are only partly separated, namely 
at the inner side, while the first or basal article appears 
nearly as long as the four following, which are much wider 
than long, taken together. In the largest specimen the 
external maxillipeds project with two-thirds of their terminal 
joint beyond the apex of the antennal peduncle, in the 
younger specimens with half that joint. 
Legs of the first pair as in Pal. duz. In the largest 
male these legs exceed with two-fifths of the carpus the 
tip of the scaphocerites; the carpus (12,75 mm.) is almost 
2,5-times as long as the chela (5,25 mm.), just as in Pal. 
duz, these numbers being in the cotype respectively 14 mm. 
and 5,8mm. The fingers are as long as the palm or 
slightly shorter. 
The second legs resemble those of Pal. dux, as regards 
their general appearance, the relative measurements of the 
joints and their toothing, but they are distinguished by 
the different spinulation. In all the specimens the 
two legs of the second pair are slightly unequal, usually 
the left is the larger, in the second male, however, the 
right. In the largest specimen the meri of both legs extend 
to the end of the scaphocerites, in the others only to the 
apex of the antennular peduncles. For the measurements 
I refer to the Table. Looked at from the outer side, the 
merus appears to increase regularly in diameter to the 
distal end, but when looked at from the upper surface it 
Notes from the Leyden Museum, Vol. X XXII. 
