On Two New Nematodes from Freshwater Fishes in the Sudan of the Genus Spironoura Leidy, 1856 and the Relation of Spironoura to the Genus Velariocephalus Singh, 1958

1. Two new species, Spironoura sudanensis sp. nov. and Spironoura hexapapillata sp. nov. are described from freshwater fishes in the Sudan. 2. The genus Velariocephalus Singh, 1958 is considered to be a synonym of the genus Spironoura Leidy, 185G.