CALLIANASSA AUDAX. 225 
while the hypotenuse is slightly curved; outer rami much 
longer than the inner. 
Length 67 mm., carapace 17,5 mm. long, measured in 
the median line. 
Palaemon (Eupalaemon) Lenzii, n. sp. 
Four male specimens collected by Mr. Greshoff many 
years ago in the river Congo, probably near Boma, and 
preserved in the Zoological Museum of the University 
of Utrecht. 
Through the courtesy of Professor H. Lenz, Director of 
the ,,Naturhistorisches Museum” in Liibeck, to whom I have 
the pleasure to dedicate this new species, I was enabled 
to examine a cotype, an adult male, of Pal. (Eupalaemon) 
dur Lenz from Avakubi upon Ituri, Equatorial Africa. I 
must in the first place draw attention to a rather confusing 
inaccuracy in the description of this species in: „Wissen- 
schaftl. Ergebn. der Deutschen Zentral-Afrika- Expedition 
1907—1908, Bd. III, Zool. I, Lief. 3, Leipzig 1910, 8. 9, 
Taf. III, Fig. 2—5,” About the rostrum, we read that no 
tooth stands on the carapace: ,,kein Zahn auf dem Cephalo- 
thorax” ; this, however, is quite wrong, because in the cotype, 
the rostrum of which fully agrees with the figure 2 of the 
cited paper, the 1st tooth is placed on the carapace, while 
the 2d is situated just above the orbital margin, so that 
the tip reaches just beyond it; the Ist tooth is situated 
at the anterior fifth of the carapace. It is, of course, a 
slip of the pen that the length of the rostrum is said to 
be 33mm. and that of the carapace 14,5 mm. When 
sending the cotype, Dr. Lenz informed me that he had 
still received a specimen of Pal, dux from a tributary of 
the Rio Benito, a small river in Spanish Guinea. ed 
The four specimens collected by Mr. Greshoff, are of 
unequal size. The largest specimen is about 85 mm. long; 
in this specimen the carapace, which is smooth, and the 
rostrum, measured from the orbital margin horizontally 
backward respectively forward, prove to be respectively 
Notes from the Leyden Museum, Vol. XX XIII. 
15* 
