IRREGULARITIES OF THE DENTAL APPARATUS. 



723 



Inferior Jaw. The augmentation in 

 the number of incisor teeth in the lower 

 jaw appears to us, all things considered, 

 less common than in the upper jaw. We 

 will cite, nevertheless, the doubling of a 

 left permanent intermediate, which we have 

 observed. 



The supernumerary teeth, which, to 

 our knowledge, are always of the second 

 dentition, do not seriously modify the char- 

 acters of the age ; they are more or less 

 solidly implanted into the alveolus, nearly 

 always displaced, and influence in a variable 

 manner the regularity of the incisive arcade. 



It is important to remark that they 

 differ from irregular teeth or from stumps, 

 vestiges of deciduous milk-teeth broken by 

 the animal or during a surgical operation. 



Canines. Our colleague, M. Ch. Mo- 

 rot, reports l having seen an adult horse 

 with seven canines ; the three supernumerary 

 (two above and one below) were situated be- 

 hind and very close to the normal canines. 



CL 



FIG. 310. One right supernumerary inter- 

 mediate, a, of the second dentition. 



FIG. 311. A supernumerary intermediate, a, of the second dentition, viewed on its anterior face, 

 A, and on its dental table, B. 



1 Ch. Morot, Recueil de m6decine veterinaire (Bulletin de la SocietS centrale de m6decine 

 vt6rinaire), 1888, p. 139. 



