DUTCH BORNEO-EXPEDITION. 55 



could state, moreover, that Potamon smwa^i/ro^rs H. M. E., 

 the habitat of which was still unknown, is indeed an in- 

 habitant of the Philippine Islands. 



As regards the localities where the species were col- 

 lected, I refer the reader to Dr. Büttikofer's account of 

 the Expedition, published in Vol. XIX, 1897, pp. 1 — 25. 



At the end of this Report one will find a List of all 

 the species of Potamon Sav. and Parathelphusa H. M. E., 

 hitherto described. 



The species collected are the following: 

 Ménippe Ortmanni, n. sp. 

 Potamon {Parathelphusa) tridentata H. M. E. 



» {Perithelphusa) borneense v. Mart., var. hilaris, n. 



» » Bilttikoferi, n. sp. 



» » silvicola, n. sp. 



» sp. 



» {Potamon) mahakkamense., n. sp. 



» » co7isobrinum, n. sp. 



» » Melanippe, n. sp. 



» (Geothelphusa) kenepai^ n. sp. 



> » hendersonianum, n. sp. 



» » Burgerij n. sp. 



» » bicristatum, n. sp. 



Metopograpsus messor Forsk., var. gracilipes d. 'M. 

 Sesarma (Sesarma) Arnphinome, n. sp. 



Remarks about the indopacific species of the genera 

 Menippe de Haan and Myomenippe Hilgd. 



Menippe de Haan. 



This genus is represented in the Indopacific Region by 

 five species, viz. : 



1° Menippe Rumphii Fabr. Indian Ocean, Makassar. 

 2° » armata Eyd. & Soul. Sandwich Islands. 

 3° » convexa Rathb. Honolulu. 

 4° » Panope Herbst. Tranquebar. 



5° » Ortmunni, n. sp. Middle Kapoeas. 



Notes from the Leyden Aluseum, Vol. XX.I. 



