lyS RESEARCHES ON FUNGI 



studying, I described the production and liberation of spores in 

 Coprinus sterquilinus} What is now about to follow is an 

 elaboration of that paper containing many additional illustrations. 

 It will constitute the first full account of Coprinus sterquilinus 

 published in the English language. 



To cytologists, histologists, and physiologists, who desire to 

 carry out detailed investigations upon a species of Coprinus, Coprinus 

 sterquilinus is to be especially recommended, owing to the ease 

 with which it can be cultivated, the considerable dimensions of its 

 pileus, and the unusually large size of its basidia and spores. In 

 one of the fruit-bodies grown in my laboratory the spores measured 

 22 /i long and 11-12 /z wide. The size of the basidia and other gill 

 elements is shown by the scale in Figs. 104 and 105 (pp. 242 

 and 249). 



Synonyms. — Coprinus sterquilinus, although so well-marked 

 a species, has been described several times under diverse names : 

 by Bolton ^ as C. ohlectus, by Lindblad ^ as C. stenocoleus, and by 

 Peik * as C. macrosporus. Some systematists, e.g. Carleton Rea,^ 

 still include C. ohlectus in their works as an independent species, 

 but there is no sufficient justification for so doing. The pilei 

 of C. sterquilinus are at first white and subsequently black ; but, 

 in changing from white to black, they temporarily become pink. 



^ A. H. R. Buller, " Die Erzeugung und Befreiung der Sporen bei Coprinus 

 sterquiliuvs," Jahrb. f. iviss. Bot., Bd. 56 (Pfeffer's Festschrift), 1915, pp. 299-329, 

 Taf. II. and III. This paper was sent to Germany just before the outbreak of 

 the Great War and was translated into German under the direction of the late 

 Professor Klebs. 



^ J. Bolton, History of Funguses growing about Halifax, Appendix, 1791, p. 142, 

 Plate 142. Bolton's illustration is reproduced by M. C. Cooke in Plate 661 of his 

 Illustrations of British Fungi. Bolton's younger fruit-bodies are correctly coloured, 

 but his older ones, at the stages shown, should have been blackish and not red. 



"^ In Fries' Monographia Hymenomycetum Sueciae, Upsaliae, vol. ii, 1863, p. 306. 

 For an illustration of C. stenocoleus vide E. Fries, Icones selectae Hymenomycetum 

 nondum delineatorum, Holmiae et Upsaliae, vol. ii, plate 140, Fig. 1. That the 

 fungus there illustrated is C. sterquilinus I have no doubt whatever. Ricken (Die 

 Bldtterpilze, Leipzig, Bd. I, 1915, p. 57) and Kauffman {The Agaricaceae of Michigan, 

 vol. i, 1918, p. 11) hold the same view. 



^ Peck {31 Report Netu York State Museum, p. 35) described C. macrosporus 

 from the State of New York. With Kauffman {loc. cit.) I agree that the description 

 exactly fits C. sterquilinus. 



^ Carleton Rea, British Basidiomycetae, Cambridge, 1922, p. 501. 



