622 APPENDIX. 
and mycological aspects (Fig. 84). Many animals are 
subject to the growth upon their skins of particular 
species of T. megalosporon. 
Fi. 84. 
These two half-plates show three-months’ growth on peptone maltose agar of 
two megalosporon varieties of the ringworm fungus. Natural size. 
ACHORION SCHGNLEINII (Favus). 
Favus is due to a fungus discovered by Schenlein in 
1839, and called by Remak Achorion schenleinii. The 
disease is communicated by contagion, the fungus being 
often derived from animals, especially cats, mice, rab- 
