484 STRUCTURE AND DEVELOPMENT OF TEETH, W. WALDEYER. 



requisite to remark that they are much stronger, and developed at an 

 earlier period, in the enamel organ than in the gum. 



The small round cells of the enamel organ between the 

 external and internal epithelium undergo at the same time a 

 peculiar transformation. They acquire a stellate form, and 

 unite with each other by their processes in the same manner 

 as the cells of ordinary mucous tissue, which this part of the 

 enamel organ so strikingly resembles that up to the time of 

 Huxley (37) and Kolliker (47) they were always regarded as 

 gelatinous connective tissue. The cells, however, lying in 



Fig. 102. 





Pig. 102. Longitudinal section of a milk tooth from the foetal sheep, 

 carried through the margin of the dentine pulp and adjoining portion 

 of the enamel organ. Magnified 200 diameters. 1. Dental sacculus. 

 2. External epithelium and stratum intermedium here united to the 

 internal epithelium or enamel cells 3. after the disappearance of the 

 enamel pulp. 4. Young layer of enamel detached from the enamel 

 cells. 5. Dentine. 6. Odontoblasts. 7. Part of the dentine pulp. 



immediate contact with the epithelium (stratum intermedium 

 of Hannover, 39) retain their original form, and from these a 

 continuous development of enamel cells, as well as of gelatinous 

 epithelial tissue, appears to proceed. The enamel cells may be 

 frequently seen to be in connection at their lower extremities 

 with the cells of the stratum intermedium, so that a multipli- 

 cation of the enamel cells from the cells of this stratum in 



