530 



3151. The fore part of the upper jaw of an older Horse, with the enamel-fold obli- 

 terated in the left outer incisor (' corner-nipper/ i 3), but not in any of the 

 other incisors. Presented by Sransby B. Cooper, Esq., F.R.S. 



3152. The fore part of the upper jaw of a Horse, with the cavity of the enamel-fold 

 obliterated in the mid-incisors (z 1), but not in the next (i 2) or outer (i 3) 

 incisors. 



This and the foregoing specimen exemplify the varieties which may occur in the oblitera- 

 tion of the ' marks ' by which the dealers pronounce on the age of the Horse. 



Presented by Sransby B. Cooper, Esq., F.R.S. 



3153. The fore part of the lower jaw, including the incisors and recently-protruded 

 canines, of a Horse of five years old. 



The incisors show the cavity in the crown called the ' mark,' which is progressively deeper 

 from the first to the third, according to the degree of abrasion of the crown, which corre- 

 sponds with the order of appearance of these teeth. 



Purchased. 



3154. The fore part of the under jaw of a Horse, with the cavity of the enamel-fold 

 obliterated in the mid-incisors (i 1), but not in the adjoining (i 2) or outer (i 3) 

 incisors. This condition is held to be characteristic of the Horse at six years 



old, or thereabouts. Presented by Bransby B. Cooper, Esq., F.R.S. 



i 



3155. The fore part of the under jaw of a Horse, with the cavity of the enamel-fold 

 obliterated in the middle (i 1) and adjoining (i 2) but not in the outer (i 3) 

 incisors. This condition is held to be characteristic of the Horse at seven 

 years old, or thereabouts. Presented by Bransby B. Cooper, Esq., F.R.S. 



3156. The fore part of the under jaw of a Horse, with the enamel-fold obliterated in 

 all the incisors, and the apices of the canines obliquely abraded. This shows 

 the Horse to be ' aged,' or past the eighth year. 



Presented by Bransby B. Cooper, Esq., F.R.S. 



3157. The fore part of both upper and lower jaws of a very old Horse, in which the 

 canines, especially the upper ones, are much worn, the major part of the crown 



