Plate III. 



Mycktoma. — I. Section showing black granules and general features of the 

 lesions as they appear under a low magnifying power. Zeiss a Y 2. Showing 

 structure and appearances of the hyphae of the mycelium obtained from the 

 granules. Zeiss apochromat., 4 mm. 3. Two bouillon cultures, showing the 

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

 of the growth. 4. Potato culture of the hyphomycete obtained from the gran- 

 ules. The black globules are composed of a dark-brown fluid. (James H. 

 Wright.) 



