1901.] CUrSTAC'El OF xnE " SKEAT EXPEOITIOiS-.'' 567 



edge is not always developed, there being an unarmed gap between 

 the tooth near the tip and a varying number proximally. 



ii. Two of these individuals only show small teeth on the 

 2nd legs ; in one they are irregular (? showing a tendency to 

 linear arrangement), in the other they are clearer and sharper, 

 and show an obvious arrangement in lines. In regard to this 

 point I quote from v. Martens (I. e.) : " Scheeren . . , , Carpus , . . , 

 beide bei erwachsenen Exemplaren mit Dornen besetzt, welche 

 sicli uamentlich an der Beugeseite in einer regehnitssige Liingsreihe 

 ordnen." Also Ortmann (Z. c.) : " bei den iibrigen c? werden die 

 Dornen immer kraftiger uud zeigen eine fiir diese xirt cliarak- 

 teristische Anordnung in Langsreihen." Both these descriptions 

 refer to P. acanthurus. 



Also the 2nd leg of this same individual is covered with a fine 

 pubescence, which is dense and thick round the fingers in a little 

 more than half of their proximal portion, a character recognized 

 in P. acanthurus. 



Here, tlieu, it may be noted that in one out of sixteen chance 

 individuals the 2nd leg presents the characters of that of 

 P. acanthurus. 



I will add that in one of the larger examples and in all the 

 smaller the palm of the hands is slightly swollen. 



iii. In all these specimens the inner lateral spines of the telson 

 are from 4-5 times the length of the outer, and ai-e relatively 

 longer in the younger individuals. All the latter have two 

 feathered plumes ; but in the adults there is this difference, that 

 the two biggest have six plumes, the two next in size four plumes. 



I note here, then, that the inner lateral spines are generally as in 

 P. nipponensh, but perhaps a little shorter relatively to the outer. 



P. nipponensis and P. cccanfhurus live in fresh water: these 

 particular individuals were captured iu an inland sea, of which the 

 upper end, I am informed, is quite fresh, the lower brackish to 

 salt ; unfortunately there is no record as to the part of the sea in 

 which they were captured. 



78. PALiEMoif pilimajN'us de Man. 



Palcemon pilimam(s, de Man, Notes Leyd. Mm, p. 181 (1879); 

 id. Weber's Zool. Ergebn. p. 471, pis. xxvii. & xxv'i'. fig. 44 (1 892) ; 

 Ortmann, Zool. .Jahrb. Syst. v. p. 735, pi. xlvii. tl-. 9 (1891). 



Loc. Aring, Kelantan, ten individuals ; Beliwbing Eiver, one 

 male. Length from 44 mm. to 30 mm. 



13 14 



Eostral formulae : — 2 c? ^ : 1 c? and 1 5 k^ ; 1 d and 1 5 



with ova -^ ; the rest -^. 



In Dr. Ortmann's figure of the telson the plumes between the 

 lateral spines are shown as being a little shorter than the inner 

 laterals ; in these individuals they are longer, being in one 

 instance (= the largest male) nearly twice as long. Three 

 specimens only possess the 2ncl pair of legs ; iu two of these the 



