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they even penetrate into the epithelium. In most cases the terminal 
fibrillae do not penetrate far into the epithelium, but remain 
Fig. 1. Nerve endings of hypoglossus fibres in the epithe- 
lium and the connective tissue of the mucous membrane 
of the tongue. 
a, b, c. Ascending fibres, not penetrating into the epithe- 
lium, but turning round and descending again towards the 
connective tissue. 
¢ = fibres penetrating into the epithelium. 
in the basal layers, where they form small endnets around different 
epithelial cells, but sometimes they penetrate into the upper layers 
of the epithelium (fig. 1 ©). 
It seems however that the epithelium offers a certain resistance 
against the ingrowing fibrillae, that makes it difficult for them to 
penetrate into the epithelial membrane. In the normal half of the 
tongue at all points of the epithelium the neurofibrillae may be seen 
