140 CRUSTACEANS OF THE 



together (Fig. la); towards the apex the intervals become 

 again larger. Usually the first three teeth are placed 

 on the cephalothorax , the fourth immediately before its 

 anterior margin ; sometimes only two are placed on the 

 carapace and then the third tooth stands above or just 

 before the anterior margin. The lower margin is armed 

 with 4 or 5 teeth. 



The cephalothorax of the adult male appears slightly 

 scabriculate anteriorly , especially towards the inferior lateral 

 margins, when seen under a strong magnifying glass, but 

 that of the female and younger specimens is smooth. 



The telson fully agrees with that of Pal. Ritsemae and 

 of most other species of the genus: it terminates into an 

 acute point, that reaches slightly farther than the external 

 subterminal spinules. 



The external maxillipedes exceed the antennal peduncles 

 by the larger part of their terminal joint. 



The first pair of legs exceed the antennal scales by their 

 chelae and their merus reaches the distal end of the antennal 

 peduncle; the carpus is slightly more than twice as long 

 as the hand, the former measuring T'/g mm. in the 

 adult male, the latter 8' ,'4 mm. 



The second pair of legs of the adult male are of equal 

 size and length, and just as long as the body; 

 their joints are cylindi*ical , so that this species belongs to the 

 subgenus Eupalaemon. The merus measures one fifth of the 

 length of the whole leg and extends to the tip of the 

 antennal scales. The carpus and the hand appear at first 

 sight equally long, but, when accurately measured, the 

 hand of both legs proves to be very slightly longer 

 than the carpus (confer the measurements). The slender 

 carpus, once and a half as long as the merus, presents 

 nearly the same breadth until the middle of its length , 

 but then gradually grows thicker until its distal end and 

 here its diameter measures '/o — ^lo ^^ ^^^ whole length. 

 The palm , nearly as long as the merus , is cylindrical , 

 being about as broad as thick , and justly as broad as 



Notes from the Leyden Museum, Vol. X.X.. 



