120 CRUSTACEANS 01' THE 



Fotamon (Geotlielphusa) Kuhli de Man, from Java, is still 

 more closely allied. Two adult males and two young 

 females from Tjibodas, described in my paper on the Crus- 

 tacea collected by Prof Max Weber in the Indian Archi- 

 pelago, are lying before me. In the Java-species one 

 observes, a little behind the outer angle of the orbits, a 

 distinct epibranchial notch and the distance be- 

 tween the outer angles of the orbits is a little shorter 

 in proportion to the width of the carapace, so that the 

 latter appears less broad anteriorly than in Pot. 

 hendersonianum. The lateral margins of the front that is 

 more profoundly emarginate, are a little more oblique and 

 the external portions of the supra-orbital margin that runs 

 transversely outward in Pot. hendersonianum are direc- 

 ted somewhat obliquely forward in the Java-spe- 

 cies; in the latter the outer angle of the orbits is much 

 less prominent. In a front view of the cephalothorax the 

 gastric region appears transversely a little more con- 

 vex in the Borneo- than in the Java-species; the front 

 appears in that view higher in Pot. hendersonianum and 

 the two halves of the free border are arcuate in the Borneo 

 species, but almost straight in Kuhli (vide de Man, in: 

 Max Weber, Zoologische Ergebnisse einer Reise nach 

 Niederlandisch Ost-Indien, T. IT, 1892, PI. XV, fig. 3a). 



The interspace between the inner angle of the inferior 

 orbital margin and the front is broader in the Java spe- 

 cies than in the other. The merus-joint of the outer foot- 

 jaws has a somewhat different form and in Pot. Kuhli 

 the ischial line reaches to the anterior margin of the ischium. 

 The male abdomen presents not exactly the same form. The 

 dactylus of the larger chela of the male is more strongly 

 arcuate in Pot. hendersonianum ; the ambulatory legs have 

 about the same shape in both species, but the dactylopodites 

 are different. In Pot. Kuhli they are narrower, more slender 

 and bear in this species a smaller number of spines 

 on their posterior margin, so e. g. on the penultimate pair 

 only three, but five in the other species. 



Note.» from the Leyden Museum, Vol. XXI. 



