Giraldes mentions the absence of teeth in an infant of sixteen months.

Bronzet describes a child of twelve, with only half its teeth, in whom the alveolar borders receded as in age.

Baumes remarks that he had seen a man who never had any teeth.
The anomalies of excessive dentition are of several varieties, those of simple supernumerary teeth, double or triple rows, and those in anomalous positions.

Ibbetson saw a child with five incisors in the inferior maxillary bone, and Fanton-Touvet describes a young lady who possessed five large incisors of the first dentition in the superior maxilla.

Rayer notes a case of dentition of four canines, which first made their appearance after pain for eight days in the jaws and associated with convulsions.