TROPICAL SKIN DISEASES. 105 



are dry, like pieces of tissue-paper. There are 

 generally about four rings which do not heal in 

 the center. General appearance is that of watered 

 silk. There are no inflammatory lesion^. Com- 

 mon in Malay peninsula. Also found in some parts 

 of the Philippines and in China. Some authorities 

 consider the fungus to be a Trichophyton. 



FIG. 42. Tropical fungi, i, concentric rings of Aspergillus concentricus; 

 2, sporangium of A. concentricus; 3, Aspergillus pictor; 4, Microsporoides minu- 

 tissimus; 5, Trichosporum giganteum; 6, black granules of Madurella mycetomi; 

 7, yellow grains of Discomyces madurae. 



5. A pictor. This is the cause of a skin affection of Central 

 America. In the affection colored spots appear 

 on the skin, chiefly on face, forearms and chest. 

 The disease is attended with a mangy odor. Spots 

 are of various colors; if the superficial epithelium 



