Marine Ascomycotina (Pyrenomycetes, Halosphaeriales) Arenariomyces tri
furcatus and Corollospora maritima were found on beach sand grains att
ached to drift wood; Holosphaeria appendiculata and Remispora maritima
were found on driftwood collected from a sandy beach on the south coa
st of Ireland. This report is the first record of these fungi from Ire
land. Preparation techniques for scanning electron microscopy are give
n and electron micrographs of the fungi are presented.