I. '21. 24 



ridges from which setae arise. Dorsally there are a few teeth 

 at the distal extremity. The carpus is broad and its upper 

 surface is gently arched from side to side. Its outer and 

 inner borders are sharply defined and slightly upturned and 

 are divided into irregular teeth, those on the inner margin 

 being the larger. At its proximal end the upper surface bears 

 some short transverse ridges and is elsewhere covered with a 

 multitude of minute granules which are so small that the 

 surface appears smooth and shining to the naked eye. The 

 inner face of the carpus is minutely granulate with some rugae 

 near the lower edge ; the outer face is finely rugose. The chela 

 is broadly expanded, gently convex from side to side, and 

 slightly convex or nearly flat from end to end. The outer and 

 inner edges are sharp, slightly elevated, and finely notched. 

 The upper surface of the propodite appears smooth, like that 

 of the carpus, but is in reality minutely granulate. The lower 

 surface is similar but with slightly larger granules. The fingers 

 are a trifle shorter than the palm and bear on their inner edges 

 a number of calcareous teeth, which are irregular in their dis- 

 tribution. On the fixed finger there is usually a large rounded 

 tooth near the middle and on the dactyl a similar tooth, placed 

 a little further forwards. The fingers end in yellow claws and 

 there is a row of yellow corneous denticles on the distal third 

 of the inner margin of the dactyl. 



The left cheliped is very much shorter and more slender than 

 the right. The merus is laterally compressed and bluntly 

 ridged above. The upper edge and outer side are covered 

 with low transverse ridges ; the inner side is smooth and the 

 lower edges bear a few teeth. The carpus is strongly compressed 

 and the upper surface bears two longitudinal ridges, with teeth 

 which tend to increase in size anteriorly. The sides and lower 

 surface of the joint are granulate or with a few low ridges. The 

 chela is longer than the carpus, with fingers much longer than 

 the palm ; the outer edge is almost straight and the inner 

 slightly curved. The upper surface, like that of the larger 

 chela, is minutely granulate, appearing smooth to the naked 

 eye ; but it bears a very conspicuous median serrate keel which 

 runs throughout its length, from the base to the tip of the 

 fixed finger and is highest opposite the base of the dactyl. 

 The outer edge of the propodite is sharp and is minutely and 

 obscurely denticulate ; the under surface is almost flat. The 

 outer edge of the dactyl is smooth. The cutting edge of the 

 dactyl is furnished with a large number of transparent cor- 

 neous spines, while that of the fixed finger has a row of small 

 blunt calcareous teeth, between which are groups of two or 

 three corneous spines. Both fingers bear a few tufts of setae 

 near their distal ends and terminate in yellow claws. 



The second pereiopods are compressed and reach very slightly 

 beyond the tip of the right cheliped. The dactyls are the 

 longest joints and are considerably longer than the propodites. 

 There is a series of about ten teeth on the lower edge of the 



