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716 of a finger-tip, remained on the forearm. Believing that it contained adult filariæ, this thickening was excised by Mr. Young and placed in normal salt solution. Eight hours later the mass was carefully dissected, and a living female filaria, about 4 in.

Fig. 117.—Lymph scrotum and varicose groin glands. (Photograph by Dr. Rennie, Foochow.)

in length, was turned out. The parasite continued to live and swim about actively in the salt solution for nearly two hours. Bahr has called attention to the frequency with which the epitrochlear gland is enlarged and thickened by filarial invasion.

Lymph scrotum (Fig. 117). Symptoms.—In this disease the scrotum is more or less enlarged.