This paper is intended as a brief summary of certain alterations and revisions which I am noting in much greater detail in my forthcoming third volume of the ‘Families and Genera of Living Rodents.’ Owing to present day difficulties, the delay in publishing this volume is greater than anticipated. It is therefore my desire to publish here certain increased knowledge on various rodents of Asia. This knowledge is the result of further detailed study since my former volumes' were published. References in the present paper are mainly to ‘Families and Genera of Living Rodents,’ Ellerman, 1940, vol. 1, and 1941, vol. 2.