Contents: Introduction. Systematic account: family : I. Erinaceidae: 1. Hemiechinus mediventris (Horsfield). II. Soricidae: 2. Crocidura andamanensis Miller. 3. Crocidura nicobarica Miller. 4. Crocidura jenkinsi Chakraborty. 5. Crocidura hispida Thomas. 6. Suncus dayi (Dobson). III. Tupaiidae: 7. Anathana ellioti (Waterhouse). 8. Tupaia nicobarica (Zelebor). IV. Pteropodidae: 9. Latidens Salimali (Thonglongya). 10. Pteropus faunulus Miller. V. Rhinolophidae: 11. Rhinolophus mitratus Blyth. 12. Rhinolophus cognatus Andersen. 13. Hipposideros schistaceus Andersen. 14. Hipposideros hypophyllus Kock and Bhat. VI. Molossidae: 15. Otomops wroughtoni (Thomas). VII. Vespertilionidae: 16. Eptesicus tatei Ellerman and Morrison-Scott. 17. Murina grisea Peters. 18. Scotomanes emarginatus (Dobson). VIII. Cercopithecidae: 19. Macaca silenus (Linnaeus). 20. Macaca radiata (Geoffroy). 21. Trachypithecus johnii (Fischer). IX. Viverridae: 22. Paradoxurus jerdoni Blanford. 23. Viverra civettina Blyth. X. Herpestidae: 24. Herpestes palustris Ghose. XI. Mustelidae: 25. Martes gwatkinsii Horsfield. XII. Bovidae: 26. Hemitragus hylocrius (Ogilby). XIII. Sciuridae: 27. Ratufa indica (Erxleben). 28. Funambulus tristriatus (Waterhouse). 29. Biswamoypterus biswasi Saha. XIV. Muridae: 30. Cremnomys elvira (Ellerman). 31. Cremnomys cutchicus Wroughton. 32. Alticola albicauda (True). 33. Alticola montosa (True). 34. Alticola roylei (Gray). 35. Millardia kondana Mishra and Dhanda. 36. Rattus palmarum (Zelebor). 37. Rattus ranjiniae Agrawal and Ghosal. 38. Rattus stoicus (Miller). 39. Rattus burrus (Miller). 40. Mus famulus Bonhote. 41. Mus phillipsi Wroughton. 42. Mus platythrix (Bennett). 43. Apodemus rusiges Miller. 44. Platacanthomys lasiurus Blyth. Discussion. Summary. References.