Abstract
Forty-one species of the algal genus Cosmarium Corda ex Ralfs (phylum Volvophycota Shameel) were collected from various freshwater habitats in Azad Kashmir as well as provinces of the Punjab and Khyber Pakhtoonkhwa of Pakistan during January 2003 and December 2006. Out of these 11 species were taxonomically investigated and described here. Among them C. pulchrum Turner, C. repandum Nordstedt, C. rugosum Turner, C. tetraophthalmum Brebisson in Ralfs, C. tumidum P. Lundell are being reported for the first time from Pakistan.