XVIIl] 



MOULD-FUNGI 



479 



filament, which subdivides by transverse septa into a series 

 of cyhndrical cells ; these by continued growth and division 

 give origin to the ordinary septate branch-hyphje. The 

 formation of conidia proceeds at the ends of these in the 

 same manner as before. The oidium lactis forms a whitish 

 mould on milk, bread, paste, potato, &c. 



Fig. 190 — Fungi froivi a Favus-Patch (Neumann). 



Favus, Herpes tonsurans, and Pityriasis versicolor of man 

 and animals, are, according to the researches of Grawitz,i due 

 to a fungus in morphological respects identical with oidium 

 lactis. In favus it is known as Ackorion Schoenleini, in 

 Herpes tonsurans as Trichophyton to?isura!is, in Pityriasis 

 versicolor as Microsporon furfur. Grawitz has shown by 

 artificial cultures on gelatine that the spherical or oval 



' Virclww's Archiv, vol. Ixx. p. 560. 



