19(18) Spores 11-12 × 7.2-7.8µm. Cap sienna. On raw dung. _Conocybe fimetaria_ - Spores 10-12 × 6-7µm. Cap pinkish to cinnamon brown. On manured soil or sewage sludge. _Conocybe fuscomarginata_ (_Conocybe siennophylla_ might be found on straw/dung mixtures or in soil in greenhouses. It differs in having smaller spores). 20(8) Cap deliquescing to some degree at maturity. Basidia of 2 or 3 different sizes. (_Coprinus_) 21 - Cap not deliquescing. Basidia of one size only. 49 21(20) Veil on cap absent, cap either covered with small hairs (setules) or naked. 22 - Cap covered with a granular, micaceous, powdery or fibrillar veil. 28 [Illustration: FIG. 56. Habit sketch of a stipitate agaric, _Psathyrella stercoraria_, with section. FIG. 57. Sketch of gill section of _Psathyrella_ sp., showing position of marginal (m) and facial (f) cystidia. FIG. 58. _Coprinus pellucidus_, habit and vertical section of cap cuticle. FIG. 59. _C. pseudoradiatus_, habit and veil constituents. FIG. 60. _C. vermiculifer_, habit and veil constituents. FIG. 61. _C. filamentifer_, veil constituents. FIG. 62. _C. stercoreus_, habit. FIG. 63. _C. cordisporus_, vertical section of cap showing nature of veil cells on the cap cuticle. FIG. 64. Veil cells with structural (l) and superficial crystalline (r) ornamentation.] 22(21) Cap without setules. 23 - Cap with setules. 24 23(22) Cap minute, 1-5mm high before expanding, reddish orange at first, soon fading. Basidiospores almost globose to triangular in one view, elliptic in another, 7-10 × 7-9 × 5.5-6.5µm. (2- and 4-spored forms have been found). _Coprinus miser_ - Cap larger, up to 15mm when expanded. Basidiospores pip-shaped, 7.5-8.5 × 9.5-11 × 9.5-11.5µm. (4-spored). _Coprinus nudiceps_ 24(22) Spores hexagonal, 10-13 × 6.5-7.5µm. Cap purplish. _Coprinus hexagonosporus_ - Spores ellipsoid. Cap brown or reddish, without purplish tints. 25 25(24) Basidia 4-spored. 26 - Basidia 2-spored. Spores 11-13 × 5.5-7µm. Facial cystidia absent. _Coprinus bisporus_ (_Coprinus sassii_, not yet recorded in British Isles, has 2-spored basidia with very large ellipsoid spores up to 20µm long).