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former teeth were looked at, the sense of disproportionate size 

 has gone. The two front teeth are now fully up, and these arc 

 almost of suitable proportions. When the two pairs of lacteral 

 incisors first make their appearance, it is in such a shape as can 

 imply no assurance of their future form. They resemble the 

 corner nippers and do not suggest the smallest likeness to the 

 lateral incisors, which they will ultimately become. 



There is now a long pause before more teeth appear. The 

 little one lives chiefly upon suction and runs by its mother^s side. 

 Upon the completion of the first month, seldom earlier, it may 

 be observed to lower its head and nip the young grass. From 

 the third month, however, the habit grows, until by the sixth 

 month, the grinders will be worn quite flat and have been reduced 

 to the state suited to their function. 



The corner incisiors come into the mouth about the ninth 

 month, the four pair of nippers which have already been tracecl 

 being at this time fully developed. The corner incisors, which 

 are depicted as through the gums, do not yet meet, though these 

 organs 2)oint toward each other, neither has the membrane of 

 the mouth at this time entirely lost the deepened hue of infancy. 



From this date, however, the gums gradually become pale, 

 till by the end of the first year, the membrane has nearly 

 assumed its normal complexion during the earlier period of ex- 

 istence. All the incisors are, by the first birthday, well up. 

 The grinding teeth which are in the mouth when the foal first 

 sees the light, are of a temporary character. The jaw, therefore, 

 has to hold and to mature the long permanent grinders which, 

 within the substance of the bone, are growing beneath the tem- 

 porary molars. To contain and to develop the large uncut 

 teeth, before appearing above the gums, causes the small jaw of 

 a diminutive foal to be disproportionately thick, especially as 

 compared with the same structure in an adult horse. 



At one year old the first permanent tooth appears. This is 

 the fourth molar, or the most backward grinder in the engrav- 

 ing. The jawbone at one year old has become longer and wider. 

 This increase of size was necessary to cover the increasing size 

 of the new molar and to afford room for the partial development 

 of two other grinders, which will appear behind what is now the 

 last tooth. Often little nceules of bone, without fangs, merely 

 attached to the gums, appear in front of each row of grinders. 



