102 THE REMNANT TEETH. 



siiperni-imerary tooth tbat appears in front of the first 

 upper premolar,' is the more or less persistent first 

 deciduous molar (d 1) of the first series, which is not 

 succeeded by a first premolar. The premolars are con- 

 sequently P. M., 2, 3, and -i of the typical educabilian 

 dentition.^' 



Prof. Pvichard Owen, who, like Drs. Gill and Leidy, 

 has a clear conception of the subject, says: 



" The second incisor appears between the twentieth 

 and fortieth days, and about this time the first small, 

 deciduous premolar takes its place. * * * The 

 representative of the first premolar is a very small and 

 simple rudiment, and is soon shed." 



Surgeon Charles Parnell, in a letter to the editor of 

 "The Veterinarian" (1867, p. 287), says: 



"In reading Prof. George Varnell's articles on some 

 of the diseases afi"ecting the facial region of the horse's 

 head, I notice a description of wolf-teeth. He says : 

 'They have been supposed to be the cause of disease in 

 the eyes of horses. This idea, however, is quite erro- 

 neous; therefore I shall not occupy any space in dis- 

 cussing this traditional error.' Well, I can safely say 

 that I have in my time extracted a great many of these 

 teeth, and not merely because they existed, but because 

 there was a weeping from both eyes, the cause of wdiich 

 was attributed to wolf-teeth, and generally in the 

 course of a few weeks the weeping has ceased. But 

 what convinces me that they do affect the eye is that 

 in several cases where there were weeping and weak- 

 ness of one eye only, I have found a wolf-tooth on the 

 affected side only, and the recovery of the eye has in- 

 variablv followed the extraction of the tooth. The 



