The interest of surgeons in webbing of the fingers and toes is evidenced by the numerous contributions that have appeared in the literature during the last century and a quarter. Our own interest was stimulated by the care of a considerable number of these patients and by the fact that there still seemed to be much confusion about the subject. An attempt will be made in this paper to clarify the matter by tracing the deformity from its origin to its correction by the methods that have been most satisfactory in our hands. DEFINITION Congenital Syndactylism. —This type is an inheritable developmental defect characterized by complete or partial webbing of the fingers or toes. This malformation varies greatly in degree, from a slight distal extension of the normal web to complete fusion extending to the ends of the fingers. Acquired Syndactylism. —Although usually a congenital malformation, syndactylism may be acquired