232 
PALAEMON (EUPALAEMON) LENZIt. 
legs of Pal. dua show nearly the same relative measure- 
ments. 
Table of measurements of the second legs in millimeters. 





N°. 1 N°. 2 N°. 3 N°. 4 
Left Right | Left Right | Left Right | Left Right 
Jeg. leg. | leg. leg. | legs Neg: leg. leg. 
Length of the merus/ 16 16 19 RS Vell Lol) 
Greatest diameter ..| 3,4 3,4 2,75 2,7 2,25 2,2 2,25 2 
Length of the carpus} 21 20 1555 1650 MID RS 13 Sale? 
Diameter at the distal 
ONG. elko rare es 8,7 3,4 2,15 3 2,5 2,3 23 -2,2 
Length of the chela| 37 33 25 27 23 21,5 20,5 19,25 
5 a en ela tk) 14,5 16 ll 12 ld 
‘ » » fingers} 15 14 10,5 11 10 9,5 8,5 8,25 
Width of the palm in 
the middle ..... 3,6 2,2 Paes roe | 2,4 2 2,25 2 
Thickness of the palm 
in the middle . 3525 2,70 | 2,25 2:5 2,25 1,9 210 

Pal. (Eupalaemon) Foai Cout. (H. Coutière, in: Bull. 
Mus. Paris 1902, N°. 7, p. 517), a species which inhabits 
the Upper Congo, and which has also been recorded from 
the river Kribi, from Cameroon and from the river Benito, 
is apparently a closely related form, but differs by the 
rostrum in which only one of the upper teeth is situated 
on the carapace. The carpus is usually one and a half as 
long as the merus, and therefore comparatively a little 
longer than in Pal. Lenzii, while the fingers, which are 
hardly more than half as long as the palm, are compara- 
tively shorter than in this species. 
Another species, which is as closely related, is Pal. 
(Eupalaemon) macrobrachion Herklots, which, however, is 
at once distinguished by the fingers of the second legs 
being thickly covered with hairs and tomentose. 
Ierseke (Holland), March 1911. 
Notes from the Leyden Museum, Vol. XX XIII. 
