Cases of this kind have been met with in foals and calves, which were
born entirely bald or with only a few thin delicate hairs scattered over
the surface. In a calf observed by the author, and which lived for
several months, the body was almost absolutely bald, and the mouth
remained edentulous, a coincidence which has been observed in other
cases. The teeth belong to the same class of embryonic tissues as the
epidermis, and a failure in the development of the one is likely to
entail a corresponding failure of the other. Schneidemühl observed that
the few hairs present in such cases were especially delicate and
brittle.