29 

 not hastily advanced. I have before me the left an- 

 terior molar, taken from the jaw of a colt which was 

 rising four. A representation of the tooth alluded 

 to is here given. 



y. 





a denotes the crusta petrosa, b the outer surface of 

 the enamel, the lines representing the plated or finely- 

 grooved aspect, which this part exhibits on its exte- 

 rior, c, which letter will, on inspection, be dis- 

 covered in the centre of the darkened space to the 

 right of the lower portion of the enamel, indicates 

 a spot where disease was existing, and to which 

 reference will be hereafter made, d denotes the 

 roots, which, as will be seen, are (although the tooth 



