PLATE XVI[|. 



Fig. 1. 



Forming enamel from incisor of rat. x 800. a, Enamel cells. 

 B, Outer fibrous layer of enamel, c, Enamel rods showing twisted fibres. 



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Fig. 2. 



Forming enamel of rat. x 400. a, Secreting papillte of enamel 

 organ, b, Enamel cells, c, Torn fibrous edge of enamel. 



International Journal of Microscopy and Natural Science. 



Third Series. Vol. VI. y 



