COPRINUS LAGOPUS i93 



my C. lagopus was identical with Mile Bensaude's C. jimetarius. 

 She had found that the haploid mycelia of her fungus refused to 

 fruit, whereas with my fungus I had observed that haploid myceUa 

 fruit, although poorly. Hanna i managed to obtain ten successive 

 haploid generations of my fungus, each generation originating from 

 a single spore and terminating in the production of haploid fruit- 

 bodies. Three years ago I had the pleasure of meeting Mile Ben- 

 saude at Kew and there, with the help of the illustrations in my 

 Researches,^ she and I compared the two fungi. She was convinced 

 that her C. jimetarius and my C. lagopus are identical species, and 

 she informed me that, subsequently to pubUshing her papers, she 

 had observed fruit-bodies in one of her haploid cultures. Thus, what 

 seemed to be an important difference between her fungus and my 

 own can no longer be said to exist. 



The Coprinus lagopus of myself and my pupils may be accepted 

 as identical not only with the C. jimetarius of Mile Bensaude but 

 with the C. jimetarius of Kniep and his pupils, of Brunswik,^ of 

 Oort,* and of others, all of whom have made experiments on sex 

 with this fungus. 



Brunswik ^ states that there is a fungus which grows in woods, 

 etc., which is the true traditional C. lagopus and that I have wrongly 

 appHed the name C. lagopus to C. jimetarius. He has found that 

 monosporous myceha of his C. lagopus will not mate with the 

 monosporous myceUa of C. jimetarius (my C. lagopus), and he 

 therefore regards the two species, although very similar morpho- 

 logically, as distinct from one another. The reasons for my employing 

 the name C. lagopus for my species with that name and for discarding 

 the name C. jimetarius are set forth in Volume III of these Researches^ 

 and will not be repeated here. 



1 W. F. Hanna, " Sexual Stability in Monosporous Mycelia of Coprinus lagopus," 

 Annals of Botany, vol. xlii, 1928, pp. 379-389. 



2 These Researches, vol. iii, Figs. 130-147. 



3 H. Brunswik, " Untersuchungen iiber die Geschlechts- und Kernverhaltnisse 

 bei der Hymenomyzetengattung Coprinus,'" Botanische Abhandlungen herausgeg. 

 V. Goebel, Heft V, 1924, pp. 1-152. 



* A. P. J. Oort, " The Sexuality of Coprinus firnetarius," Proceedings of the 

 Koninklijke Academic van Wetenschappen te Amsterdam, vol. xxxii, 1929, pp. 1-6. 

 ^ H. Brunswik, loc. cit., pp. 94-95. 

 6 These Researches, vol. iii, 1924, pp. 302-303. 



VOL. IV. ° 



