VETERINARY DENTAL SURGERT. 241 



by the gums at birth, but make their appearance in 

 from one to five days. 



At two weeks the central incisors will be well up 

 and the extreme corners of the lateral incisors will 

 be visible under the gum, and are through about the 

 third or fourth week. At six to eight weeks both 

 pairs as well as the temporary molars are well up 

 and the foal able to masticate solid food. The cen- 

 tral incisors have their surface very slightly worn, 

 the infundibulum not yet being entirely surrounded 

 by structures which have come into wear. The 

 wear of the lateral incisors is confined to the anterior 

 edge nearest the central teeth. 



From two to seven months no perceptible change 

 in the teeth is noticed, except that those already up 

 increase in size bringing the whole of their table sur- 

 face into wear. Sometimes however, the posterior 

 border of the incisors do not come up even with the 

 anterior border until later. 



At from seven to eight months the anterior bor- 

 der of the corner incisors may be seen protruding 

 through the gum. At nine months they are entirely 

 through, with their anterior edges even with the edges 

 of the other incisor teeth. A triangular space pos- 

 teriorly and externally will still remain out of wear. 



The fourth molar, which is permanent, now 

 makes its appearance and by the end of the first year 

 is even with the temporary molars but has not yet 



