200 



RESEARCHES ON FUNGI 



and for the presence of clamp-connexions, Fig. 118 ; and for con- 

 jugate nuclei and conjugate nuclear division, Figs. 142 and 147. 



Fig. 116. — (Joprinun layopua. Pliotomicrograpli of a haploid mycelium, Mr. Brodie's 

 No. 10 {AB), which liad been growing for seven days in a hanging drop of malt- 

 agar ; to iUustrate the production of oidia. The drops which appear as black 

 balls are all filled with oidia, and they are borne on the ends of oidiophores 

 projecting into the air. The very numerous oidia in the film of moisture at 

 the surface of the culture medium arrived at their present position : in part 

 by oidial drops coming into contact with the film of moisture, in part by being 

 developed from the first on oidiopliores lying in the film of moisture, and in part 

 by floating about in the film of moisture. Photomici ograph taken through the 

 cover-glass and the culture medium, under the direction of the author, by 

 H. J. Brodie. Magnification, 100. 



In the present investigation no cytological work has been done. 

 In distinguishing a haploid from a diploid mycelium all the five 



