167(166) Spores unequally 2-celled, one brown ellipsoid, with an apical germ pore, 10-12 × 6.5-7.5µm, the other a basal hyaline, cylindrical pedicel, 6-8 × 3µm. Cleistothecia black, globose, up to 250µm diam., covered with flexuous brown hairs up to 1mm long. Asci evanescent. _Zopfiella erostrata_ - Spores equally 2-celled. 168 168(167) Spores not constricted at the septum, ellipsoid, golden-brown, 25-30 × 10-15µm with 1-3 guttules in each cell. Cleistothecia gregarious on a mycelial mat, whitish to pale orange, up to 500µm diam. _Heleococcum aurantiacum_ (fig. 48) - Spores hyaline, divided into two almost globose cells by the constricting septum. Ascomata superficial, globose, dark coloured. (_Mycoarachis_) 169 169(168) Asci 8-spored, 5.5-11µm diam. Spores 5-5.5 × 3-3.5µm. _Mycoarachis inversa_ - Asci 4-spored, 6-6.5µm diam. Spores 4.5-5 × 2-2.5µm. _Mycoarachis tetraspora_ 170(166) Asci broad-clavate, (1)-2-(3)-spored, 30-50 × 13-18µm. Spores brown-black with short ridges and warts, subglobose, 12-15.5 × 11-12.5µm, with a single germ pore. _Copromyces bisporus_ (fig. 49) - Asci 8-spored. 171 171(170) Spores globose, sooty brown, 3µm diam. Cleistothecia gregarious, with basal spirally coiled appendages, black, 100-200µm diam., partially immersed in a white to red felty hyphal mat. _Pleuroascus nicholsonii_ - Spores larger, ellipsoid or limoniform. 172 [Illustration: FIG. 46. Habit sketch of cleistothecia. FIGS 47-54. Asci and spores. FIG. 47. _Preussia funiculata._ FIG. 48. _Heleococcum aurantiacum._ FIG. 49. _Copromyces bisporus._ FIG. 50. _Arachnomyces nitidus._ FIG. 51. _Orbicula parietina._ FIG. 52. _Roumegueriella rufula._ FIG. 53. _Aphanoascus stercoraria._ FIG. 54. _Pseudeurotium ovale._] 172(171) Spores olivaceous, limoniform, usually with an apical germ pore. Perithecia greyish or greenish, abundantly hairy, branched or simple, straight or curly. Asci pedicellate, soon disappearing. see _Chaetomium_ at 5 - Spores darker, with 1 or more minute germ pores. Cleistothecia distinctly but not abundantly hairy. 173