HORSES' TEETH. 



CHAPTER I. 



TOOTH-GERMS (0D0NT0GEN"Y). 



Periods at wliicli the Germs are visible in the Fetus. — DeDtine 

 and Enamel Germs. — A Cement Germ in the Foal. — The 

 Horse's Upper Grinders said to be develoi-ed from Five 

 Germs, the Lower from Four, — Similar development of the 

 Human Teeth.— Monsieur Magitot's Researches. 



FuRKOWS ill what is subsequently transformed into 

 jawbones, in wliich tooth-germs are, as it were, planted, 

 are Nature's first visible preparation for the develop- 

 ment of the teeth. According to Prof. William You- 

 att, the germs of the temporary teeth are visible seven 

 or eight months before the foal is born. Three months 

 before its birth the germs of the permanent teeth are 

 also visible, a distinct partition separating them from 

 the temporary. At this time, according to Veterinary 

 Dentist C. D. House, the capsules or bags (also called 

 follicles, sacs, &c.), containing the tooth-pulps*' of the 



* The pulp in the cavity of a fall-grown tooth is a delicate 

 mass of connective tissue, containiog both blood-vessels and 

 nerves. Its external layer consists of large nucleated cells, the 

 odontoblasts, provided with long branching processes which line 

 the dental canals. Boll thinks the nerves' delicate terminal 

 fibrils accompany the processes into the canals. — Woodicard. 



For development of elephant tooth-germs see Appendix. 



