160 ZOOLOGISCHE ME DEDEELINGEN — DEEL I. 



The male cheliped is very peculiarly shaped, inasmuch as the palm is 

 not inflated but compressed and weak. The meropodite (arm) has several 

 curved spines at the second half of the interior margin; there is no „musical 

 crest"; the carpus has two distinct spines at the anterior border, near 

 the joint with the palm; the palm is thin and much elongated, with 

 minute granules on the outer surface and a fur of fine hairs on the inner 

 surface ; this fur extends to the fingers. The length of the palm is about 

 twice its greatest height and the lower margin, which is bordered by 

 two parallel serrated crests, passes with a deep curve into the immo- 

 bile finger; the upper border is much rolled over, especially in its 

 proximal half, and provided with a row of distinct spines. At the inser- 

 tion of the movable finger a part of the palm seems to be detached, so 

 as to form a separate joint, but the suture separating this part from the 

 rest of the palm is not continued on the inner surface. On this inner 

 surface there is a distinct spine (near which one or two smaller ones 

 are to be seen) near the carpal end of the palm, at the same place therefore 

 as the similar spine on the palm of such species as M. brevis, sulcatus 

 etc. The fingers are also peculiar ; they are weak and compressed, much 

 curved inward and about half the length of the palm ; the movable finger 

 keeps about the same height throughout its length and is provided at the cut- 

 ting margin with five or six small, widely separated denticles, without larger 

 tooth; the immobile finger is very slender and provided before the middle 

 of its length with a high tooth, rising perpendicularly to the longitudinal 

 axis of the finger, the hinder margin of this tooth is finely denticulated, 

 the anterior border is smooth; between this tooth and the tip of the 

 finger there are no denticulations, but only a rather large, simply pointed, 

 second tooth. The female palm is much smaller, though likewise com- 

 pressed, the length of the palm is but slightly more than its greatest 

 height, the fingers are as long as the palm, somewhat more strongly 

 built than in the male, and provided at the cutting margin with three 

 or four finely pointed denticles. 



The ambulatory legs are very long, and, as usual, the middle pairs 

 are much stronger than the first and last pair. The meropodites of the 

 first three pairs have a rather large spine at the anterior border, near 

 its distal end, and the whole anterior border is distinctly tuberculated ; 

 the posterior border of the meropodites of the middle legs have several 

 spines, placed somewhat more proximally than the single spine just named. 

 Carpo- and propodite of the penultimate pair of legs are peculiar by 

 their length; they are much longer than those of the foregoing pair. 

 The last legs are slender and weak, hairy along the margins ; their length 

 is not much inferior to that of the first pair. 



