1916] 
Emic—Yerast FUNGI 269 
Sixty to 65 per cent of the fungous affections of the scalp 
are caused by Sporotrichum of Microsporon, including eleven 
varieties which are divided by Sabouraud into two groups: 
those of the Sporotrichum Audowm type which give slow- 
growing cultures on artificial media, and those of animal 
origin which yield rapidly growing cultures. The disease, 
frequently derived from domestic animals, rarely attacks the 
glabrous skin, and contagion is more frequent from case to 
ease. At least four varieties of Sporotrichwm are parasites 
common to man and animals. 
Upon microscopic examination of the diseased hair, the 
fungus appears in crowded cells, 2-3» in diameter, irregu- 
larly arranged so as to form a continuous covering of the 
hair without penetrating the cuticle. In the interior we find 
delicate parallel filaments of large cells. In infection with 
Microsporon the growth of the fungus progresses from the 
tip of the hair to the lower parts. 
S. Furfur (Robin) басс. Syll. Fung. 4:100, 1886. 
An affection of the cuticle, called ‘‘tinea versicolor,” is 
characterized by the yellowish or brownish discoloration of 
the lesions, which at one time were classed with the group 
of pigmentary stains. The color of the lesion is subject to 
great variation, not merely in different patients, but in dif- 
ferent regions of the same patient. This affection caused by 
S. Furfur was first discovered by Hichstedt in 1846. Little 
is known of the mycological characters of this parasite. 
S. (Microsporon) minutissimum басс. in Gedoelst, Les 
Champ. Par. 1902. 
An epidermomycosis, erythrasma, presenting some points 
of resemblance to tinea versicolor, is characterized by brown- 
ish scaly patches which appear usually in the genitocrural 
region. The elements of this species are very small, and 
in preparations, appear as spores and threads of mycelia ar- 
ranged almost in the same manner as the elements of 8. 
Furfur. 
The recognition of sporotrichial infection other than those 
occurring in skin diseases, is of recent date. The infection, 
