14 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



LiMNiEA BKEVispiEA, Martens. 



JIah. — Mount Bongson. 



The sender describes these specimens as " de la petite marre." But 

 the latter word is not in Contanseau's French Dictionary : ' marais ' 

 would be understandable ; ' marre ' is perhaps a local French variant. 



LlMN^A. EXCAVATA, MoUSSOU. 



Hah. — Mount Sago. 



LiMN^A BoNGSONENSis, u.sp. PI. II, Figs. 5, 6. 



Testa producte ovata, tenuis, fiisco- cornea; anfractus 4, convexi, 

 lineis incrementi striati ; anfractus ultimus elongatus, tumidus, ad 

 suturam non impressus, notis transversis pellucidis pallide eorneis 

 pictus ; spira brevis, erosa ; apertura subpyriformis ; columella 

 tortuosa, fusco - castanea, intus nitida, fusco-cornea ; labium super 

 regionem columellarem late appressum ; peristoma simplex. Long. 21, 

 lat. 12 mm. 



Hob. — Mount Bongson. 



IsiDORA SuMATEANA (Martens). 



Hah. — River at Souliki. 



Exterior much stained by impure water of habitat. Dr. E. von 

 Martens^ described this species as having seven whorls, but three 

 specimens (figs. 27-29) are figured with six only. These latter agree 

 with mine, which have a similar number. 



Planorbis PEOCLivis, Martcus. 

 Hah. — Mount Singalong. 



Ampullaria Sumatrensis, Phil. 

 Hah. — From the rice-fields, Pajakombo. 



Vivipara Sumatrensis, Dkr. 

 Hah. — Pajakombo, and river at Piladang. 

 Dark variety. 



Melania Indragirica, Martens. 

 Hah. — Piver Indragiri, and a variety from the River Kwantan, an 

 affluent of the Indragiri. 



Melania (Plotia) scabra, Mliller. 

 Bah. — Brook at Piladang. 



Melania (Plotia) datura, Dohrn. 

 Hah. — Brook at Pajakombo. 



Melania distinguenda, Brot. 

 Hah. — River of Pajakombo. 



Zool. Ergeb., Band iv, Heft 1, p. 8, pi. i, figs. 26-29. 



