BULLEN : SUMATRAN LAND AND FRESH-WATEE MOLLUSCA. 15 



Melania PAGODA, Lea. 

 Var. cosTULATA, Schepman. 

 Hah. — River of Pajakombo. 



Melania Savinierei, var., Morlet. 



Melania Savinierei (Brot MS.), Morlet : J. de Conch., 1884, p. 330, 

 pi. vii, fig. 2. 

 Sah. — River of Pajakombo. 



Melania curvicosta, Martens. 

 ! Hab. — River of Mount Merapi. 



Var. Prestoniana, n.var. PI. II, Fig. 8. 

 I' Testa typo similis sed minor, laevigata ; costse Ion gitudin ales, 

 I obsoletae, striae et lineae incrementi plus minus deletse ; color f uscus ; 

 ! anfr. ? , superiores abrupti ; reliqui 3-4 convexiusculi ; anf ractus 

 Idistalis clausus. Long, ad 25-5, diam. max. 11 mm. 

 Hah. — Mount Merapi. 



Smaller than type, ribs obsolete, spire truncated, and distal whorl 

 sealed. 



Melania Javanica, Von dem Busch, var. 

 Sab. — River Kwantan, affluent of the Indragiri. 



Melania lieata, Benson. 

 Hah. — River of Mount Bongson. 



Melania subplicata, Schepman. 

 Hah. — River at Souliki. 



Melania unifasciata, Mousson. 

 Hah. — River at Souliki. 



Melania Sykesi, n sp. PL II, Fig. 7. 

 Testa pyrgiformis, epidermide fusco-olivacea induta, longitudinaliter 

 costata, costis nodosis ad apicem ; sutura impressa ; anfractus 9 convexi, 

 ultiraus liris quatuor spiralibus basi cinctus ; peristoma tenue, ali- 

 quantum incrassatum ad columellam non-productam ; apertura elongate 

 elliptico - rhomboidalis, simplex, intus pallide - olivacea, pellucida. 

 Long. 21, diam. max. 6 mm. 



Hab. — Piladong and the Souliki Range. 



Unio Sumatrensis, Lea. 

 Hai. — Rivers Indragiri and Kwantan. 



Unio Pajakomboensis, n.sp. PL II, Figs. 9-11. 



Testa solida, ovata, tumida, inaequilateralis, antice et postice leviter 



hians, nitida, flavido - f usco - viridis ; valvse postice decliviter sub- 



rotundatae, concentrice substriatae ; umbones propinqui, erosi ; dens 



anterior cardinis valvae dextrae longus, erectus, declivis, fere laevis, 



