SUMMARYHigher marine fungi, predominantly from mangrove habitats, were examined. More than half of the species occurred on pneumatophores or roots ofAvicenniaor on seedlings or proproots ofRhizophora.The others were found on pilings, driftwood, or their spores were found in foam on the seashore. Collections were mainly made in Liberia and Mexico; others came from Fiji, Florida, India, Mozambique, Pago Pago, the Philippines, Puerto Rico, Venezuela, and the Virgin Islands. All species are reported for the first time from these localities and represent 13 Ascomycetes (belonging to the generaCorollospora, Didymosphaeria, Haligena, Halosphaeria, Keissleriella, Leptosphaeria, Lulworthia, Mycosphaerella, Paraliomyces, Remispora, Torpedospora)and 7 Deuteromycetes (Cirrenalia, Clavariopsis, Culcitalna, Humicola,“Phoma”).A new combinationRemispora salinais proposed and two new species ofCirrenaliaare described.