622 



APPENDIX. 



and mycological aspects (Fig. 84). Many animals are 

 subject to the growth upon their skins of particular 

 species of T. megalosporon. 



FIG. 84. 



These two half-plates show three- mouths' growth on peptone maltose agar of 

 two megalosporon varieties of the ringworm fungus. Natural size. 



ACHORION SCHGENLEINII (Favus). 



Favus is due to a fungus discovered by Schoenlein in 



1839, and called by Remak Achorion schcenleinii. The 



disease is communicated by contagion, the fungus being 



often derived from animals, especially cats, mice, rab- 



