236 Mr. E. J. Miers on Malaysian Crustacea. 



larger, the fingers are of a chocolate-brown colour ; in the 

 smaller they are nearly colourless. 



The truncated frontal lobes, with the armature of the cara- 

 pace and chelipedes, apparently suffice to distinguish this 

 species from its very numerous congeners. Many of the 

 species of Pilumnus, however, are insufficiently known, and 

 the genus is one which greatly needs a thorough revision. P. 

 Bleekeri somewhat resembles P. actumnoides, A. Edw., which 

 is represented as having the antero-lateral margins armed with 

 more numerous teeth, and the hands more granulated on their 

 external surface. 



Pilumnopeus granulosus, sp. n. 

 (PI. XIII. figs. 4, 5, 6.) 



Carapace transverse, about once and a half as broad as 

 long, and covered with small regularly disposed granules, 

 which tend to become obsolete toward the posterior margin. 

 Front rather prominent, divided by a small triangular median 

 sinus into two lobes, the anterior margins of which are 

 straight and rather oblique. Posterior to the frontal lobes, 

 and occupying the interorbital space, are two small promi- 

 nences. The antero-lateral margins are armed with five 

 teeth (including the outer orbital tooth, which is very small) ; 

 the orbital margins are without fissures, and the internal 

 orbital hiatus is occupied by the outer antennas, the basal 

 joint of which is small and does not nearly reach the front. 

 The anterior legs (in the female) are robust, the arm very 

 short and smooth ; the wrist regularly and evenly granulated 

 on its outer surface, but without a spine at its antero-internal 

 angle ; palm covered on its outer surface with numerous 

 granules ; dactylus also granulated to Avithin a short distance of 

 its extremity ; both this and the lower joint are strongly 

 denticulated on their inner margins. Ambulatory legs 

 slightly compressed and nearly smooth. Abdomen of female 

 7-jointed. 



Indo-Malayan Region. One specimen of this very pretty 

 little crab is in the collection ; but the precise locality has not 

 been preserved. 



It must, I think, be included in Pilumnopeus of A. Milne- 

 Edwards, a genus which, to judge from the descriptions, can 

 scarcely be distinct from Eurycarcinus of the same author. 

 From Sphm-ozius, Stimpson, this species is distinguished by 

 its much broader carapace ; from Actumnus, Dana, by the 

 same character, and by the brevity of the basal antennal 

 joint. 



