1088 MALAYSIAN LAND AND FRESHWATER MOLLUSCA, 



Animal with the mantle margin fringed. Most of the species 

 from India and Ceylon. 



Paludomus isseli, Brot, Gatt. Palud. p. 31 = P. crassus, 

 (v. d. B.), Issel, Moll. Born. p. 95. 



Sarawak, Borneo. 



P. BROTi, Issel, Moll. Born. p. 92 ; Brot, Gatt. Palud. p. 32. 



Sarawak, Borneo. 



P. LUTEUS, H. Adams, Proc. Zool. Soc. 1874, p. 585 ; Brot, 

 Gatt. Palud. p. 46 = P. moreleti, Issel, Moll. Born. p. 93. 



Sarawak, Borneo. 



Note. — The Bivalves are reserved for another paper. 



EXPLANATION OF PLATES. 



Plates xxvit-xxx. 



Fig. l.—Hybocystis elephas. Animal (?). See p. 1073. 



Fig. 2.— „ ,, „ ((?). Seep. 1074. 



Fig. 3. — ,, ,, ,, Profile view. 



Fig. 4.— „ ,, Radula. See p. 1075. 



Fig. 5a. — ,, „ Portion of one of the mandibular plates, veiy 



much enlarged. 

 Fig. 5b. — ,, ,, The same, much more highly magnified. 



(The above drawings are those of M. Fischer from the "Journal de 

 Conchyliologie, xxv., 1885, p. 179.) 

 Figs. 6-7. — Shell of Bnlimus perversiis, L. 

 Figs. 8-9. — Shell of Hyhocystis elephas, De Morgan. 

 Figs. 10-11. — Operculum of,, ,, ,, 



Fig. 12. — Bulimus sp. (?) (Borneo) 

 Fig. 13. — Cydophorus sp. Thaiping, Perak. 

 Fig. 14. — Helix algira, L. 

 Fig. 15. —Alycmus gibbus, Fi^russac. 

 Fig. 16. — Pirena terebralis, Lamarck. 

 Fig. 17. — Helix citrina, L. 



Fig. 18. — Cydophorus sp. Pulo-Pankore, Perak. 

 Fig. 19. — Melania episcopalis. Lea. 

 Fig. 20. — Nanina brookei, Adams & Reeve. 

 Fig. 21. — ,, sumatrensis, Mousson. 

 Fig. 22. — ,, mendaiensis, Semper. 

 Fig. 23. — ,, huyonis, Pfeiffer. 



