Gilbert—Cytological Studies of Lower Basidiomycetes 397 
Fig. 25. 
Fig. 26. 
Fig. 27. 
Fig. 28. 
Fig. 29. 
Basidium with one nucleus beneath the elongating sterigma 
preparatory to the passage through the sterigma. The 
remaining nuclei show a further decrease in size. 
Basidium with two nuclei at the base of the sterigmata, the 
other two nuclei distinctly degenerating. 
Portion of mycelium at base of fruiting body, showing a 
uninucleate cell and a binucleate cell. 
Typical binucleate cell in region immediately beneath hy- 
menial layer. 
Cell in growing portion of fruiting body containing two 
nuclei, one of which is dividing preparatory to the mi¬ 
gration of one of the daughter nuclei which is being 
formed. 
Department of Botany, 
University of Wisconsin 
