[Illustration: FIG. 21. Ascospores of, from left, _S. ovina_, _S. intermedia_ (with gelatinous sheath characteristic of the genus), _S. lageniformis_, _S. vexans_, _S. bipartis_ and _S. minima_.] 13(12) Spores 65-95 × 15-18µm. _Sporormiella megalospora_ - Spores longer than 90µm. 14 14(13) Spores 90-118 × 15-20µm. Asci tapering gradually from the broadest part near the apex to a 'stipe'. _Sporormiella ovina_ (figs 18, 21) - Spores 91-114 × (14)18-21µm. Asci cylindrical, abruptly contracted below to a short 'stipe'. _Sporormiella borealis_ 15(12) Spores mostly less than 35µm long. 16 - Spores mostly between 35-60µm long. 19 16(15) Spores less than 25µm long. 17 - Spores 25-35(38)µm long. 18 17(16) Spores (15)17-24(26) × 5-7µm, end cells broadly conical. Ascospores uniseriate. Asci 120-135µm long. Pseudothecia 250-300µm diam. _Sporormiella pulchella_ - Spores 16-22 × 4.5-5.5µm, end cells subovate. Ascospores biseriate. Asci 95-125µm long. Pseudothecia 300-350µm diam. _Sporormiella nigropurpurea_ 18(16) Spores 30-38.5 × 5.5-6.5µm. Asci clavate, tapering gradually below to a 'stipe'. _Sporormiella leporina_ - Spores 27-36(38) × 4-6(8)µm, tending to break in two at the middle septum. Asci cylindrical, abruptly contracted below. _Sporormiella minima_ (fig. 21) 19(15) Spores with end cells rounded. Asci cylindrical, abruptly contracted below. 20 - Spores with end cells tapered and slightly conical. Asci clavate, tapering gradually to a long stalk. 21 20(19) Spores 45-65 × 8-11.5µm. _Sporormiella intermedia_ (figs 19-21) - Spores 38-46 × 6.5-8µm. _Sporormiella australis_ 21(19) Spores 45-60 × 11.5-14µm, germ slits parallel with long axis. _Sporormiella grandispora_ - Spores 35-45(48) × 7-9(10)µm. _Sporormiella lageniformis_ (fig. 21) 22(11) Spores 5-celled, 70-80 × 17-19µm. _Sporormiella pentamera_ - Spores more than 5-celled. 23 23(22) Spores 7- or 8-celled. 24 - Spores 13-celled, 46-60 × 9-10µm. _Sporormiella antarctica_ 24(23) Spores 7-celled. 25 - Spores 8-celled. 26