FIG. 33. Oi'dium lactis (after HANSEN) : 1, Hyphae with forked partitions; 2, two ends of 

 hyphae one with forked partition, the other with commencement of development of a spherical 

 link ; 3 7, germinating conidia ; 6 6"', germination of a conidium, sown in hopped beer- 

 wort in Ranvier's chamber, and represented at several stages ; at each end germ tubes have 

 developed ; after 9 hours (6'") these have formed transverse septa and the first indications of 

 branchings ; 11 14, abnormal forms ; 15, 16, hyphae with interstitial cells, filled with plasma ; 

 17, chain of germinating conidia ; 18, conidia which have lain for some time in a sugar- 

 solution ; the contents show globules of oil ; 19, old conidia. 



