DUTCH BORNEO-EXPEDTTION. 85 



that the fingers appear faintly grooved. Under a strong 

 lens a similar close and fine granulation is shown by Pot. 

 borneense var. hilaris, the palm presenting fine reticulating 

 lines that are minutely granular. 



The smaller hand of the adult male measures scarcely 

 three fourth the width of the cephalothorax, the fingers 

 are but little longer than the palm and almost in contact 

 with one another. In the younger specimens the smaller 

 chela is still shorter, so in the youngest male ifc is little 

 more than half as long as the cephalothorax is broad. 



The ambulatory legs are comparatively as long as in 

 the preceding species and are also quite glabrous, but they 

 are more slender. So e. g. the legs of the penultimate 

 pair are almost once and a half as long as the cephalo- 

 thorax is broad, measuring 56 mm. in the adult male. 

 The upper margin of the meropodites terminates into an 

 acute tooth and the outer surface is granular, excepted 

 those of the last pair ; they are slender, so e.g. those of 

 the penultimate pair are a little more than 3 

 times as long as broad, the propodites are 2'/2-times 

 as long as broad, in the middle, and the stout terminal 

 joints are somewhat longer than the propodites. The upper 

 surface of carapace and legs is mottled with similar small 

 spots of a red colour as in Pot. borneense var. hilaris. 



Measurements in millimetres: 



Greatest width of the cephalothorax 



Length „ « „ 



Distance between the external orbital angles . . . 

 H If the tips of the epibranchial teeth. 



u ; the tip of the epibranchial tooth 



and the external orbital angle 6 



Breadth of the free border of the front . 

 Distance between the free border of the front near 



its outer angles and the epigastric lobes ... 3^ 

 Distance between the free border of the front and 



the posterior boundary of the gastric region . . 

 Width of Ihe posterior margin of the cephalothorax. 



Width of the orbits 



Height „ , , 



Notes from the Leyden Mxaseuin, "Vol. XXI. 



