low, cup-shaped crust of the size of a pin's head will develop, which at once settles the question of diagnosis. These bright-yellow, pin-head cups multiply and by coalescence form a sulphur-colored crust which is quite characteristic (Fig. 6).
Ringworm and favus of non-hairy parts cannot be considered as serious affections, but when the parasitic fungus of either finds its way into the hair follicles upon the scalp, as often happens with children, the case is quite different. The unfor-
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Fig. 6.—Favus corporis.
tunate child is now the victim of an extremely obstinate disease, and, unless judicious measures are adopted without delay, is doomed to months or perhaps years of annoyance, if not of actual suffering. Upon the scalp these affections are always obstinate, and when this fact is not appreciated by the physician in charge of the case, and inefficient measures are adopted, the case usually goes from bad to worse until a cure seems nearly hopeless.
The first indication of ringworm of the scalp is commonly a
