ACHORION SCHONLEINII 



421 



The mould is found in the scales of the skin, in the form of homo- 

 geneous or granular septate and branched hyphens, 3 to 5 micra 

 thick. The filaments are often thinned out at their free ends and 

 thickened at the points where branches arise. Some of the hyphens 



FIG. 168 



FIG. 169 



Culture three weeks old from ringworm of cat 

 contracted from ringworm of girl's face. (Mew- 

 born.) 



Culture of Achorion Schonleinii. 

 (Mewborn.) 



are broken up into oval spores 3 to 6 micra in diameter. Sometimes 

 the mould is found in the skin as a very dense, felted mycelium. 

 Achorion Schonleinii requires more proteid material for its growth on 

 artificial media than Trichophyton tonsurans. Its optimum temper- 



FIG. 170 



Achorion Schonleinii: a, spores; b, c, sporophores. (After Cornil and Ranvier.) 



ature is at 25 C. On gelatin its growth somewhat resembles tricho- 

 phyton, but the medium is only liquefied after several weeks. On 

 potatoes and beets an elevated, folded, grayish-white growth is formed, 

 which later becomes grayish yellow. It grows well on agar kept in 



