<unk>  is characterized by<unk> on found in short segments along the shafts of several hairs, with each branch of the<unk> on being covered with its own cuticle.
Pili bifurcati
Retrocuspid papilla
Soemmering ring
Vossius ring
Pili pseudoannulati
Gräfenberg's ring
Pili multigemini
Munk's Roll