130 FASCICULI MALAYENSES 



up to the level of the tips of the eyes, from which point it curves roughly in 

 the arc of a circle with forwardly directed convexity, to join almost, but not 

 quite, the anterior border of the last epibranchial tooth. From the point 

 where the crest takes on a forward direction a distinct groove or suture runs 

 down the steep anterior surface of the crest as far as the base of the extra- 

 orbital tooth. The front is salient, in the one specimen with its anterior edge 

 straight or even very slightly convex, in the other excavate in the middle line 

 so as to give rise to two shallow lateral lobes ; laterally it curves away gradually 

 into the supraorbital border which is thick, and especially so at a point just 

 behind the base of the eye-stalks. None of these ridges — whether teeth, crest, 

 front, or supra-orbital border — are denticulated ; a faint rugosity may be 

 detected here and there with the lens, but generally speaking they are quite 

 smooth. The sub-orbital border, however, is distinctly denticulated. 



The impressed line on the ischium of the third maxillipedes lies close to, 

 and practically parallel with, the inner border ; the outer surface of the meri 

 is distinctly excavate. The cheli pedes do not present any particularly 

 characteristic features ; the merus is armed with a conical spine near the distal 

 end of its upper border, and the carpus has the usual spine on its inner and 

 upper border, this spine being strong and sharp without any subsidiary 

 spinules at its base. 



13. Sesarma taeniolatum, White. (Fig. 3) 

 Alcock, J.A.S.B., vol. Ixix, pt. 2, p. 419 (1900). 



Four large males. Patani Bay. 

 The musical ridges form exceedingly prominent short ridges tipped with 

 tubercles. 



14. Sesarma maculata, de Man. 

 Weber's, Zool. Ergebn, p. 347, pi. 21, fig. 19. 

 Lanchester, P.Z.S. y p. 550, 1901. 



A small $ . Bukit Besar. 2,500 feet. 

 ' From sweep-net among low vegetation near jungle stream.' 



A small $ . Same mountain. 3,500 feet. 



' Among bamboo beds at top of hill some distance from water.' 



The second epibranchial tooth is absent in the $ on the right side, and 

 only represented on the left by a small tubercular prominence. In the $ it is 

 present on both sides as a distinct tubercle. 



On the base of the movable finger there are only two to three indistinct 

 teeth. 



