96(3) Apothecia stalked. 97 - Apothecia not stalked. 98 97(96) Apothecia up to 2mm diam., with a short cylindrical stalk, light brown. Asci 150 × 10µm. Spores hyaline, with 2 oil drops, occasionally 1-septate, 13-15 × 4.5µm. _Lanzia cuniculi_ - Apothecia up to 3mm diam., pale olivaceous to grey, with a long, slender, reddish-brown stalk arising from a sclerotium in the dung. Asci 30-40 × 4-5µm. Spores ellipsoid, grey-brown, 4-4.5 × 2µm. _Martininia panamaensis_ 98(96) Spores 7-11(14) × 1.75-2.75µm. ellipsoid, ellipsoid- fusiform or slightly clavate. Apothecia yellowish brown when fresh, drying darker, up to 1mm diam. Asci 42-60 × 7.5-9µm, pore weakly blue in iodine. _Pezizella albula_ - Spores and asci smaller. 99 99(98) Spores linear, 3-5 × 1µm. Asci 30 × 5µm, cylindrical with a short stipe. Paraphyses not clavate but fused to form an epithecium. Apothecia pale pellucid, 0.5-1mm diam. _Orbilia leporina_ - Spores longer, subulate, curved. 100 100(99) Spores 7-8.5 × 1.2-1.8µm. Asci 36-40 × 3-5µm, gradually tapering to a short base. Paraphyses enlarged to 3µm at apex, covered with brown granules. Apothecia light brown, 0.4-1.mm diam. _Orbilia fimicola_ - Spores 8-10.55 × 0.9-1µm. Asci 30-45 × 3µm, cylindrical-clavate with narrow tapering base and truncate apex. Paraphyses 2µm diam., the tips with a crust-like secretion fusing together to form a shiny epithecium. Apothecia white to yellowish, 180-700µm diam. _Orbilia fimicoloides_ Key 2. Perithecial, pseudothecial, cleistothecial and gymnothecial fungi 1 Perithecia occurring singly or in groups, but directly (key 1,2) on the dung or buried in it (figs 16, 28, 19, 22, 27, 30, 32, 34-36). 2 - Perithecia occurring in or on a mass of fungal tissue (stroma) growing in or on the dung (figs 32, 37). 135 2(1) Spores black, brown or dark olive-greenish. 3 - Spores hyaline or pale coloured, at least under the microscope (may be coppery red _en masse_). 117 3(2) Spores smooth, without an ornamentation of hyaline pits. 4 - Spores 1-celled, ornamented with hyaline pits. (_Gelasinospora_) 114