128 DE. J. G. DE MAN ON THE PODOPHTHALMOUS 



similar to those of M. quadratus, but they are a little longer, 

 more compressed and more earinate. The palm is longer than 

 its greatest vertical depth, at the articulation with the mobile 

 finger, the length being in proportion to that depth as 15 : 11. 

 The hands are much compressed ; the outer surface of the palm 

 appears smooth to the naked eye ; the upper margin is earinate 

 and granular, and the somewhat rounded under margin is also 

 a little granular. When the outer surfaces of the palm and 

 fingers are examined under a sufficiently powerful lens, they 

 appear to be uniformly covered with innumerable minute 

 granules. The inner surface of the palm is densely covered with 

 a tuft of hair, and armed a little before the middle with an 

 acute spiniform tooth. The cephalothorax of all other species, in 

 which the inner surface of the hands is spiniferous, is much more 

 enlarged, being at least twice as broad as long. The fingers 

 resemble those of M. quadratus. The lower margin of the 

 immobile finger is in a straight line with the lower margin of the 

 palm, and its outer surface is longitudinally grooved near the 

 under margin. The upper or inner margin presents a strong 

 longitudinal tooth, occupying its proximal half, and this 

 tooth is minutely crenulate or denticulate above ; two or three 

 very small teeth are also to be observed between the horny ex- 

 cavated tip and the large proximal tooth. As in M. quadratus, 

 the fingers, when closed, meet only towards their apices, there 

 being a hiatus between them ; the inner margin of the mobile 

 finger has a small, quadrangular, minutely crenulate tooth near 

 its base, and a few minute teeth before the excavated tip. The 

 spoon-like excavated tips are somewhat hairy. 



The chelipedes of the female are, as usual, much smaller than 

 those of the male. Their arms have entire margins, the upper 

 and anterior margins being clothed with rather long hairs. The 

 " musical crest " is wanting. The wrist is also somewhat hairy 

 on its inner surface. The small hands, including the fingers, are 

 nearly thrice as long as high. The palm near its lower margin 

 presents a longitudinal groove, which extends upon the immobile 

 finger ; the upper margin of the palm and of the mobile finger 

 are longitudinally grooved, the grooves reaching to their tip. 

 The fingers are scarcely longer than the palm, and their exca- 

 vated tips are hairy. The inner margins of the fingers present 

 only a few very minute teeth, so that they appear entire to the 

 naked eye. The inner surface of the palm is unarmed. 



