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The degree of fusion ranges from a web of skin joining the fingers to a fusion of the bones, the latter being well seen in skiagrams.

Fragmentation is exhibited in the skiagram forming the subject of plate XI. p.

A chondroma appears as a clear area in a skiagram.

It should be noted that all the above changes can be followed in skiagrams.

Sometimes the separated epiphysis fails to unite, and although this gives rise to no disability, it is liable to lead to errors in the interpretation of skiagrams.