This paper deals with the fauna of the six small and shallow bodies of water in the neighbouring districts of, and at some distance from, Teheran in Iran. The fauna of those waters is composed of only the Crustacea, i. e., Cladocera, Copepoda and Ostracoda. Even the species occurring in the richest number did not exceed nine, followed by six, and varying mostly from one to three. Cyclops tatricus is the dominant species occurring in almost all the bodies of water under study, with Daphnia magna and Ceriodaphnia reticulata in less abundance. The chydorids are representatives in the summer months. The annual changes are discussed concerning the species in the biocenosis of the pool at Chahar Donghe west of Teheran. This temporary water is discussed also in its typological aspect.