90 VEGETABLE PARASITES. 



the spores, seeds or reproductive parts of the fungus. 

 These spores may be quite free or grouped together 

 in masses. The spores are practically buds at the end 

 of the Dermatophyte filament. 



These minute vegetable forms live only in and 

 upon epidermal products and the epidermis itself. 

 They invade the cells of the outer skin, and even the 

 hairs and feathers, destrovino; the two latter and 

 causing the former to separate and decompose. In 

 this way they produce intense itching, soreness, and 

 redness. 



They are spread no doubt by contagion, and seem 

 to flourish best in young individuals. They are also 

 known as 'Tinese,' and may be easily cultivated 

 artificially. 



Favus. 



Favus takes its name from the curious honey- 

 comb-like structure of the deeper layers of the 

 1 crusts ' it produces on the skin. These curious 

 cup-shaped yellow masses of crusts are produced by 

 the fungus Achorion Schonleimi (fig. 23) of Remak, 

 It is a parasite common to man, the cat, dog, rabbit, 

 and fowl. In the former three it causes the hair to 

 fall, in the latter the feathers. Not only is it found 

 in hairy and feathery parts, but it, for instance, 

 aftects the roots of the nails in man, giving rise to the 

 disease called Onychomycosis favosa. 



