Jouh. B. Micro. Soc., 1897. Pl. IV. 
Fig. 5. — From section of developing Tooth of Embryo Dog. X 900. 
a. So called “ stellate reticulum.” b. Stratum intermedium. c. Outer ameloblastic 
membrane, d. Ameloblasts. e. Inner ameloblastic membrane. /. Formation of 
enamel by calcification of successive layers of sections given off from the ameloblasts. 
ij. Dentine. 
Fig. G. — From section of persistently growing Incisor of Mouse. X 400- 
a. Cells of stratum intermedium, h. Outer ameloblastic membrane. ' c. Ameloblasts. 
d. Formation of enamel. The commencement of the formation of the enamel rods is 
very clearly shown, e. Dentine. /. Odontoblasts. 
Jour. K. Micro. Soc., 1897. Pl. V. 
Fig. 7. — From section of developing Tooth of Embryo Dog. X 1000. 
a. Stratum intermedium, b. Outer ameloblastic membrane, c. Ameloblasts, show- 
ing the cells filled with masses of the albumen-like calcific-bearing material from which 
enamel is formed, d. Inner ameloblastic membrane, e. Enamel. 
p’ 1G . 8. From section of mature Human Enamel, x 1000. 
a, b. Bands of Ketzius. c. Enamel rod passing through bands of Eetzius without 
break in its continuity. 
