632 MR. c. tiocK ON SHELLS tROM [May 17, 



18. Cyclophorus tuba, Sow. 



Mount Sago and Sidjoendjoeng ; rarer than the foregoing species. 



19. Megalomastoma sectilabrum, Gould. 

 Found 8 specimens at Paio. 



B. Freshwater Shells. 



The ponds of the Padong district teem with different species of 

 Melania, Ampullaria, and Paludina. Such of these as I could not 

 make out have been determined by Dr. Aug. Brot, of Geneva. 



20. Ampullaria ampullacea, Linn. 



All over the highlands in ponds, and in the " sawahs " (rice-fields). 



21. Paludina ingallsiana, Lea. 

 One specimen from Boea. 



22. Paludina hamiltoni. 



The specimens differ from those in the British^ Museum in being 

 more rounded at the top. 



23. Paludina sumatrensis, Dunker. 



Common in the " sawahs " (rice-fields) at Boea, and in the rivers. 



24. Melania datura, Dohrn. 

 Boea. 



25. Melania semigranosa, Busch. 

 Found at Boea and Tanar Datav. 



26. Melania lirata, Bens., var. granosa. 



27. Melania laevigata. 

 Localitrj. Boea and Tanar Datar. 



28. Melania malayana, Issel. 

 Locality. Boea and Tanar Datar. 



29. Melania sumatrensis, Brot. 

 One young specimen found at Boea. 



30. Melania bceana, sp. nov. 



31. Melania provisoria, sp. nov. 



32. Melania bockii, sp. nov. 



Localittj. Boea. 



The new species of Melania will be described by Dr. Brot in 

 M. Crosse's ' Journal de Conchy liologie.' 



