78 

 to form some notion of the extent of the horse's mouth 

 and likewise of the positions of the teeth. Near to the 

 teeth will be seen figures which do not denote the 

 periods when these organs first appear, but the time 

 at which they are fairly up, or to some extent exhibit 

 wear. In that engraving no further notice is taken 

 of the milk teeth than is conveyed by the small star 

 associated with such of the figures as indicate the 

 places from which they have been displaced : thus 

 the figures 1, 2, and the last 4, having no star, in- 

 dicate that those molars are developed only as per- 

 manent teeth. The figures 3*, 3*, 3% having stars, 

 denote that milk teeth originally occupied the situa- 

 tions where these teeth are shown : those figures will 

 be seen above and below the central incisors and the 

 first two molars of either jaw ; and as but one side of 

 the face could be displayed, of course the number 

 has to be doubled, the colt getting twelve additional 

 permanent teeth by the time it completes the third 

 year. At three years, therefore, the central perma- 

 nent nippers are in apposition, and show wear, 

 though to only a limited extent. The infundibulum 

 is broad, as depicted in the accompanying cut. 



