The Melanoid Form 



745 



of several of the pads of the toes, to be either translucent and myxo- 

 matous or yellowish and necrotic in appearance. The black granules 

 were embedded in the tissue and appeared mulberry-like and less 

 than i mm. in diameter. They were firm, and when enucleated and 

 pressed between cover and slide did not crush. Only after digestion 

 with a solution of caustic potash and careful teasing could the 



Fig. 309. Melanoid form of mycetoma. Two bouillon cultures showing the 

 powder-puff ball appearance. In one the black granule is seen in the center of 

 the growth (James H. Wright). 



Fig. 310. Melanoid form of mycetoma. Potato culture of the hyphomycete 

 obtained from the granules. The black globules are composed of a dark brown 

 fluid (James H. Wright). 



granules be resolved into the hyphae of the mold. The central part of 

 the granule formed a reticulum, with radiating, somewhat clavate 

 elements projecting from it. 



In sections of tissue it was found possible to stain the fungus with 

 Gram's and Weigert's stains, though prolonged washing removed 

 most of the dye. 



