Since its first publication in 1964, Walker's Mammals of the World has become a favorite guide to the natural world for general readers and professionals alike. This new Walker's volume is a completely revised and updated compendium of information on five of the earliest clades to diverge from ancient mammal stock. Uniquely comprehensive in inimitable Walker's style, it incorporates a full account of every genus that has lived in the past 5,000 years. Every named species of each genus is listed in systematic order and accompanied by detailed descriptions of past and present range.

Updated accounts of 19 orders of mammals from Walker's mammals of the world.

Preface -- World distribution of mammals -- Class Mammalia : mammals. Monotremata : monotremes -- Didelphimorphia : Didelphidae : American opossums -- Paucituberculata : Caenolestidae : "shrew" opossums -- Microbiotheria : Microbiotheriidae : monito del monte -- Notoryctemorphia : Notoryctidae : marsupial "moles" -- Dasyuromorphia : Australasian carnivorous marsupials -- Peramelemorphia : bandicoots -- Diprotodontia : koala, wombats, possums, wallabies, and kangaroos -- Afrosoricida : tenrecs and golden moles -- Macroscelidea : Macroscelididae : sengis, or elephant shrews -- Bibymalagasia : Plesiorycteropodidae : bibymalagasy -- Tubulidentata : Orycteropodidae : aardvark, or ant bear -- Hyracoidea : Procaviidae : hyraxes, or dassies -- Proboscidea : Elephantidae : elephants -- Sirenia : dugong, Steller's sea cow, and manatees -- Cingulata : Dasypodidae : armadillos -- Pilosa : sloths and anteaters -- Scandentia : tree shrews -- Dermoptera : Cynocephalidae : colugos, or flying lemurs.