308 DR. J. G. DE MAN ON SPECIES OF PAL^MON 



fino-ers are covered in the last-named species. The merus is 14'5 mm. long, the carpus 

 18 mm., the band 25-25 mm., viz. the palm 16 mm., the fingers 9'25 mm. Just as in 

 Palcemon macrobrachion^the carpus is distinctly longer than the merus and shorter than the 

 ■whole hand ; it is also a little longer than the palm and almost twice as long as the fingers. 

 The latter measure little more than one-third the length of the whole hand. The slender 

 merus thickens gradually and regularly towards the distal end, and, being here 2'4 mm. 

 broad, this joint appears just six times as long as the thickness at the distal end. The 

 merus of P. macrobracMon thickens not so regularly towards the distal extremity. The 

 slender carpus widens likewise regularly towards its distal extremity, and, being here 

 25 mm. broad, this joint appears just seven times as long as thick at the distal end. The 

 hand closely resembles that of the male of P. macrobracMon from Liberia described 

 p. 303. Viewed from above, the palm appears 2"2 mm. broad, and presents the same 

 breadth along its whole length ; in a lateral view, just as in P. macrobrachlon, 

 the breadth slightly decreases towards the base of the fingers, and in the middle of its 

 length the palm is 1'9 mm. thick. The palm is not quite cylindrical, but very nearly 

 so, and it is a little less broad than the distal end of the carptis. Just as in the male 

 from Liberia, the fingers are a little curved inwards, so that the inner margin of the hand 

 is slightly concave. The fingers shut close together. The dactylus appears at its base a 

 little broader or thicker than the other finger, and tapers regularly towards the tip ; it 

 is armed with a small conical tooth just at a third of its length from the articulation, 

 and between it and the latter there are still two other similar teeth. The immobile 

 finger likewise carries a tooth, a little nearer to the articulation than in the other finger, 

 and also two other teeth between the articulation and the distal tooth. Between the 

 distal tooth and the tip a sharp cutting-edge is seen on each finger. The joints are 

 covered with small spinules which on the upper outer side are smaller and less numerous 

 than elsewhere ; on the outer border of the palm they are arranged in a longitudinal 

 row, but they are here a little smaller than on the inner margin. These spinules 

 occur also on the fingers. The joints of this leg are very slightly hairy; the hairs, 

 however, are very short and fine, and the leg has a reddish colour. In the larger leg of 

 the second pair of P. paucidens from Togo Country, the merus was 113 mm. long, the 

 carpus 11'5 mm., the palm 15'5 mm., and the fingers 9"6 mm. ; merus and carpus were 

 thus shorter than in our specimen, especially the carpus, which was scarcely longer than 

 the preceding joint. 



In the species described by Hilgendorf the fingers were each armed, beside ndth the 

 basal teeth, with seven spines ("Dornen"), standing on both sides of the cutting- ed ge ; 

 these spines are loJiolly wanting in our species from the Hicer Kribi. 



The three posterior legs of our specimen resemble those of P. macrobrachlon; 

 they are, however, a little stouter. Those of the third pair project, by little more than 

 their terminal joints, beyond the scaphocerites, those of the two other pairs only by 

 half their dactylopodites. The meropodites of the fifth pair are 11'5 mm. long and 

 1'04 thick, measured on the outer side ; the carpopodites are 6"5 mm. long and 1*5 mm. 

 thick at the distal end; the propodites are exactly as long as the meropodites and 

 0'7 mm. broad in the middle; the terminal joints are 3"1 mm. long. 



