1 86 MANUAL OF MODERN FARRIERY 



"infundibulum," is open at the side next the table, 

 and forms a reflected funnel. 



Through wear, the enamel of the incisors is 

 divided into two portions, the exterior or casing 

 enamel, and the other, the interior, which envelopes 

 the infundibulum. The enamel being harder, and 

 offering more resistance than the dentine and crusta 

 petrosa that surrounds it on all sides, the central 

 enamel presents a slight prominence, and takes on 

 different forms in proportion as the funnel becomes 

 destroyed and contracted. 



As we have stated, the horse has forty teeth, 

 namely, six incisor, or cutting teeth, in both jaws, 

 (see Plate in, fig. 2, b, b] ; two tushes, or canines, 

 in each jaw, a, a ; and six molars, or grinders, in 

 both jaws, h y h. There is a considerable vacant 

 space between the incisors and tushes, as also 

 between the tushes and grinders, as will be seen by 

 the figure referred to. These teeth are inserted into 

 sockets, consisting of a spongy bony substance, 

 called the alveolar process, which forms the edge 

 of the maxillary bones. All the teeth are first 

 germinated in the interior of the maxillary bones ; 

 and having acquired a certain size, and the exterior 

 table of their sockets having been removed by ab- 

 sorption, they push out above the gums. Those 

 which appear shortly after birth are called sucking 

 or temporary teeth ; these consist of all the incisors 

 and the three first molars. The formation and 

 appearance of the others are later, and are called 

 the permanent teeth ; and those which succeed the 

 temporary are called the rephcers, or horse-teeth. 



