176 MICROSCOPIC ANATOMY OF THE TEETH 



Mr. Carter's argument as to the structure of marsupial 

 enamel must fail, as it would be shown that the enamel is 

 laid down in a fibrillar organic basis substance and is not 

 merely a colloidal product. With regard to the deposition 

 of the lime salts, Mr. Carter considers Leon Williams's views 

 are erroneous, and describes a sponge- work formation with 

 large meshes in which what he considers to be the fibril is 



FIG. 98. Macropus. Incorporation of Tomes' processes in 

 the forming enamel, (x 1,000.) 



laid down and a further congelation of the colloid with 

 regular meshes in which the lime salts are deposited to form 

 the prisms, the regular meshes being as it were the moulds 

 in which the calcific matter is deposited. The illustrations 

 to this book we think give the strongest support to Leon 

 Williams's view. 1 



Fig. 98 shows very clearly the incorporation of the 

 Tomes' processes in the forming enamel. 



1 For a fuller discussion of this question see the author's reply to 

 Mr. Carter in the Proceedings of the Royal Society of Medicine, May 1918. 



