AN EXPEDITION TO MOUNT KIN A BALU. 85 



one is allied to a form found in the island by the Dutch Central 

 Borneo expedition." 



Suborder MACRURA 



Tribe Caridea. 



Family Pal^MONID^:. 



Genus Pal^mon. 



1. " Palcemon (Macrobrachium) pilimanus de Man. 

 Palcemon pilimanus, de Man, Notes Leyd. Mus. i. p. 181 



(1879); Yeth's 'Midden Sumatra,' Crust, p. 4, pi. ii. fig. 2 (1882). 

 Palcemon {Macrobrachium) pilimanus, Ortmann, Zool. Jahrb. 

 x. Syst. p. 735, pi. xlvii. fig- 9 (1891) ; de Man, Notes Leyd. Mus. 

 xx. p. 158 (1898). 



The single specimen, which is from the Innuman River, be- 

 tween Kalawat and Bungol, British North Borneo, differs from 

 Ortmann' s figure in having the submedian spines of the telson 

 considerably shorter ; it is very possible, however, that the ends 

 of these have been worn or broken off." 



Suborder BRACHYURA. 



Tribe Cyclometopa. 



Family POTAMONID^:. 



Genus POTAMON. 



2. " POTAMON (PARATHELPHUSA) CONVEXUM (de Man). 

 Paratelphusa convexa de Haan, de Man, Notes Leyd. Mus. i. 



p. 63 (1879) ; Max Weber's 'Reise Ned. 0. Ind.' ii. p. 302 (1892). 

 Potamon (Parathelphusa) convexa, de Man, Notes Leyd. Mus. 

 xxi. p. 142 (1899). 



The single specimen seems, by the following characters, to 

 belong to this species. 



i. There are two epibranchial teeth on each side, 

 ii. There is a spine near the end of the merus in the walk- 

 ing legs, 

 iii. The distance between the tip of the postorbital tooth and 

 that of the first epibranchial tooth does not exceed the 

 distance between the first and second epibranchial teeth, 

 iv. The outer edge of the first epibranchial tooth is strongly 



convex. 

 v. There are no spots on the carapace or limbs. 



