The naturalist, Pehr Forsskal collected samples (phanerogams and cryptogams) from Estac (France), Turkey, Egypt and Yemen between 1761-1763. The collected plants were published in Flora Aegyptiaco-Arabica in 1775 including a list of 16 algal species from Turkey. In the present work, algae of Turkey from the Herbarium Forsskalii were studied. Several herbarium sheets have been lost and therefore, we were unable to identify some of Forsskal`s collections. The aim of this research was to identify some of the remaining species and to annotate with regard to taxonomy and nomenclature.