29 329 



A small species, the adult female measuring 85 mm. long, 9.5 wide in front, 

 97 wide behind, front 51 mm. wide. 



Koh Kong, on the coast, above the water; XII. 21; 1 ? juv. At Government 

 Station, right opposite Koh Kong; XII. 21 ; 1 ^. Koh Kut, stony coast; I. 10; 1 d* 1 ? 

 (type). Koh Chick, rocky coast; I. 30; 1? juv. 



The shape of the carapace and the ornamentation of the movable finger are 

 different from any other species of this group. 



Sesarma (Chiromantes) haswelli de Man. 



Sesarma Haswelli de Man, Jour. Linn. Soc. London, Zool., XXII, 175, 1888. 



Mangrove swamp. Lem Ngob; XII. 23, 24 and 27; 3 c? 2? (1 ovig.) 2 juv. 



Sesarma (Chiromantes) lividum A. Milne Edwards. 



Sesarma lividum A. Milne Edwards, Nouv. Arch. Mus. Hist. Nat., V, 25, 1869; IX, 303, pi. XVI, fig. 2, 1873. 



River on the west coast of Koh Chang (not above the limit to which the salt 

 water enters at high water); I. 16; 1 c?- Klong Salakpet (River on Koh Chang); 

 III. 15; 1?. 



Compared with specimens collected by M. Balansa at New Caledonia and 

 determined by A. Milne Edwards. 



In this species the pectinated ridges on the upper surface are very ill-defined. 



Sesarma (Holometopus) aubryi A. Milne Edwards. 



Sesarma Aubryi de Man, Jouru. Linn. Soc. London, Zool., XXII, 168, 1888. 

 Koh Kut, stony coast; I. 10; 1 Ç. 



Sesarma (Parasesarma) plicatum (Latreille). 



Cancer qiiadralus Fabricus, Entom. Syst., Suppl., 341, 1798. Not C. quadralus Fabricius, Mant. Ins , 



I, 315, 1787, nor C. quadrala Meuschen, 1781. 

 Sesarma quadratum Alcock, LXIX, 413, 1900. 



Koh Kut, stony coast; I. 10; 1Ç juv. 



River on the west coast of Koh Chang (not above the limit to which the salt 

 water enters at high water); I. 16; 1 c?. 



Fences between rice-fields at Klong Salakpet (River on Koh Chang); 2? 2 juv. 



Metaplax dentipes (Heller). 



Metaplax dentipes Alcock, LXIX, 433, 1900. 



Mangrove swamp. Lem Ngob; XII. 23, 24 or 27; 1 c?. 



Metaplax elegans de Man. 



Metaplax elegans Alcock, LXIX, 434, 1900. 



Mangrove swamp. Lem Ngob; XII. 23, 24 or 27; 3 d*. 



