ENAMEL 



FIG. 55. Spindle-like bodies terminating dentinal tubes within 

 the enamel of Bettongia. Ground section. ( x 50.) 



e 



A B 







FIG. 56. A. Longitudinal section at apex of dentine cusp of Phalanger 

 orientalis showing tubes passing into enamel and others entering the 

 spindle-shaped spaces, d. Dentine ; e. enamel. ( x 130.) 



B. Section in same position of human temporary molar injected with 

 fuchsin from pulp, (x 130.) 



