Decalcified sections of the teeth and periodontium of monkey, dog and man were stained by peracetic acid-aldehyde fuchsin, oreinol-new fuchsin and impregnated with silver and viewed in polarized and non-polarized light.Both the silver and the peracetic acid-aldehyde fuchsin stained morphologically identical fibres. Oreinol-new fuchsin failed to stain these structures. Attention is drawn to the similarity between oxytalan fibres and nerve elements.