Abstract
The special points in the formation and structure of enamel which I have attempted to elucidate in this paper may be summarised as follows:— 1st. The existence of a very thin membrane, or a structure of membrane-like appearance, lying between the ameloblasts and the forming enamel, and also between these cells and those of the stratum intermedium. I have also, in many specimens, seen a similar membrane covering the odontoblasts. 2nd. The formation of enamel by deposit and not by cell calcification. This deposit probably consists of two distinct cell products—a granular plasm and spherules of calcoglobulin.

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