2i8 RESEARCHES ON FUNGI 



lagopus behaves essentially in the same manner as a haploid my- 

 celium of Typhula erythropus that I have collected the data embodied 



Fig. 125. — Coprinus lagopus. The diploidisation of a large liaploid mycelium (AB) 

 by a small haploid mycelium (ab). The large haploid mycelium was allowed to 

 grow on cleared dung-agar imtil it was 60 cm. in diameter. It was then 

 inoculated at its periphery with a tiny liyphal mass of (ab) mycelium having 

 the size and position of the white spot which has been marked on the right-hand 

 side of the photograph. At the end of 64 hours after inoculation, the large 

 haploid mycelium had become completely diploidised by the (ab) mycelium, 

 as shown by the appearance of clamp-connexions on all its periplieral leading 

 radial hyphae (vide Fig. 118). The photograph was taken five days after 

 inoculation and two days after the large haploid mycelium had become com- 

 pletely diploidised. Tlie darkness of the central part of tlie mycelium is due 

 to the aerial hyphae having become submerged in liquid excreted by oidio- 

 phores when the myceliiun was in the haploid .state. The hyphae which com- 

 pose the outer fluffy white ring are diploid and bear no oidiophores. Natural size. 



in Table II and have made the calculations of the speed of movement 

 of the nuclei shown there in the last two columns. 



