COPRINUS HEMEROBIUS 



39 



longer than usual ; but only in one point did there seem to be a 

 difference which might be important, namely, in the spores being 



Fig. 23. — An extremely large form of Copriints plicaiilis, probably identical with 

 the C. hemerobiiis of earlier autliors, obtained in Queen's Cottage Grounds, 

 Kew Gardens. The pilous is unusually large and the spores and cystidia 

 unusually elongated. A : a, a very young fruit-body ; 6, two older fruit-bodies, 

 the larger one expanding ; c, a vertical section through the larger fruit-body 

 shown at b. B, details of structure of the larger fruit-body shown at A 6 : a, 

 palisade cells from the upper surface of the fruit-body ; b cystidia (cheilo- 

 cystidia) on the edge of a short gill ; c, two cystidia (pleurocystidia) which 

 projected from the side of a gill ; d, a piece of the hymenium showing sterile 

 paraphyses, one long basidium bearing spores, and two short basidia on which 

 the spores have not been represented ; e, four spores of a basidium seen from 

 above, showing two differing dimensions for each spore ; and /, some of the 

 elongated spores, lying in water. C, spores of a normal C. plicaiilis fruit-body 

 for comparison with those shown at B, /. Magnification : A, natural size ; 

 B, o-e, 293 ; B, /, G83 ; C, G83. 



compressed-oval although somewhat pointed at the apex (B, /), 

 instead of being distinctly flattened heart-shaped {cf. B, / and C). 

 However, the spores in different normal C. plicatilis fruit-bodies vary 

 much in size and shape (Fig. 32, p. 48). I therefore came to the 

 conclusion that the fruit-bodies under discussion, notwithstanding 



