PALAEMON PILIMANUS. 



d83 



crossing one another, and the whole length of the inner 

 margins is armed with 13 — 15 blunt, almost equal and 

 equidistant teeth. The fingers of" the small hand are rather 

 longer than the palm , also closely united to one another , 

 and provided with a smaller number of similar teeth as in 

 the great hand. The legs of the second pair appear to 

 be smooth to the naked eye, but the outer surface of the 

 arms , and also in some less degree of the other joints are co- 

 vered with minute spines , only perceptible with a magnifying 

 glass. The external surface of the palm , except a small portion 

 at the base , and the external surface and the inner mar- 

 gins of the fingers , are covered with long coarse hairs both 

 in the great and in the small hand. The internal surface 

 of the various joints is smooth. In the female the second 

 pair of legs are somewhat smaller than in the male, but 

 they have the same shape and physiognomy. In young 

 specimens of a length of 28 mm., the second pair of legs 

 are already unequal in size and wholly resembling those 

 of the adult animals. — The third pair of legs reaches to 

 the end of the antennal scale , but the fifth pair does not 

 project to the tip of that organ. 



Seventy specimens of this fine species (of which only 

 10 or 12 are females) have been collected by Mr. Snel- 

 leman in the river of Alahan-Pandjang , and five more 

 specimens at Moeara-Laboe , both localities of the interior 

 of the island of Sumatra. 



The largest male specimen has a length of 45 mm.; 

 the second pair of legs measures respectively 52 mm. and 

 38 mm.; the arm of the larger leg measures 12 mm., the 

 carpopodite 6 mm., the hand 28 mm., of which 14 mm. 

 for the palm ; the arm of the smaller leg is 9 mm. long , 

 the carpopodite 4^/2 mm., the hand 19 '/j mm., and the 

 palm 8 mm. 



The second pair of legs of a female specimen of 36 mm. 

 measures respectively 30 mm. and 22 mm. ; the measures are 

 respectively (when following the same order as for the male) of 



Notes from the Leyden IMuseum.. 



