IRREGULARITIES IN NUMBER AUGMENTATION. 



123 



(prognathism, brachygnatliism) ; excess of length of the superior 

 incisive arch. 



7. Excess or fault of use. 



8. Marks produced by cribbing. 



9. Fraudulent alterations, — removal of the milk-teeth, 

 bishoping. filing the corners. 



IRREGULARITIES IN NUMBER AUGMENTATION. 



Incisors. — The most curious example of this anomaly is 

 one which was noted for the first time by Lafosse, in 1772. 



Vl(. 127 



He states that he found horses with double rows of incisive 

 teeth. This anomaly was again noted by Goubaux, in 1842. 

 His case had two rows of incisors of second dentition in each 

 jaw, making twenty-four in all. 



Augmentation or duplication of the incisors of second den- 

 tition for one or two pairs of teeth is not rare. The accompany- 

 ing plates give an excellent example. In Figure 125 there are 

 two supernumerary pinchers {a a) and one supernumerary inter- 

 mediate tooth (h). Figure 126 shows two supernumerary inter- 

 mediate teeth (rt and b). Figure 127 has an intermediate tooth 



