This document provides a classification of mammals and describes various primate species found in India. It begins with the high level classification of mammals such as Mammalia, Theria, Eutheria, Metatheria and Prototheria. It then describes characteristics and orders of marsupials and monotremes. The majority of the document focuses on describing characteristics, distributions and conservation statuses of various primate species found in India, including several species of macaques, langurs and gibbons.