From 149 fishes examined the authors obtaied several helminths in Macaé Coast, Rio de Janeiro State, Brazil. A new species is presently described and some only refered. The helminths were recovered from February, 1970, to December, 1971. The authors give general parasitism by helminthic groups and the percentage is calculated based only on the infested fishes. In preceding papers the authors had described two new species, that here are only refered: Procamallanus macaensis Vicente & Santos, 1972 and Pulchrascaris caballeroi Vicente & Santos, 1972. the new species now enclosed is Rhipidocotyle fluminensis sp. n. Sterrhurus imocavus Looss, 1907 and Cucullanus cirratus Mueller, 1777 are given to be new host record and new geographical distribution. Pleorchis mollis Poche, 1926, Lecithochirium microstomum Chandler, 1935, Homalometron longulum Travassos, Freitas & Buhrnheim, 1965, Porrocaecum secundum Chandler, 1935 are also new host records. The authors give original camera lucidan drawings of some of the species here presented.