VETERINARY DENTAL SURGERY. 159 



the upper jaw, but in an inverse direction. The 

 third one which has a length of nearly two and one- 

 half inches has produced the depression in the palate. 

 The fourth, fifth and sixth molars are missing in the 

 specimen." It is probable that the fourth was lost in 

 preparing the head, but there is no doubt that the 

 fifth and sixth were lost during life, as can be seen 

 by the wearing out of the outside surface of the 

 alveolar cavities, and their almost complete disap- 

 pearance. This is the second case of this kind that 

 has come under our observation. The first however, 

 was more complete, as the irregularity of the teeth 

 existed on both sides and both jaws. When the 

 animal died all the teeth were not only found on 

 both sides of both jaws, but the animal presented 

 also an abnormality in the number of teeth, having 

 twenty-eight instead of twenty-four molars. This 

 irregular condition of the teeth furnishes a ready 

 explanation of the difficulty of mastication, and can 

 scarcely be relieved, except by bestowing a degree 

 of attention to the organs which it is not yet usual 

 to bestow on animals." 



The sixth molar of either jaw, may and of ten does, 

 extend back of the corresponding one of the oppo- 

 site jaw and when such a condition exists, the pro- 

 jecting portion not coming into wear, is continually 

 increasing in length, by being projected outwards 

 until it wounds the opposite jaw. This condition is 



