Welsford. — Conjugate Nuclei in the Ascomycetes. 417 
divisions play an important part * in the life cycle of the plant, and considers 
that ‘ cognizance of the phenomenon ’ must be taken in all investigations 
into the sexuality and phylogeny of the Ascomycetes. 
If, however, the results here described are shown to be general for the 
Ascomycetes, and there is some evidence of this, the observation of conjugate 
nuclei in the ascogenous hyphae would give us no help in elucidating the 
sexual phenomena of the group. The paired condition of the nuclei may 
simply be the response to the physiological conditions usually found in such 
hyphae, that of high nutrition associated with rapid growth. 
