Abstract
The skin in the cheek of a cynomolgous macaque was observed with a scanning electron microscope. The following results were obtained concerning the hairs:
1. A great part of hairs in the cheek grew singly.
2. Various hairs in size grew in the cheek.
3. The breadth between the free margin of an upper cuticle and that of a lower one was narrow in thick hairs.
4. The border between the cuticles which were transversely in contact with the other was not clear in many cases.
5. Membranous cristae were observed at the free margin of the cuticle on the surface of hairs.
6. The cuticle was observed in layers on the cut surface of hairs.
7. The cuticle was closely in contact with others.
8. On the cut surface of hairs small processes were observed at the margin of the cuticle.
9. Many fibrous structures were observed on the surface of the cuticle.
10. Many small pores were scatterlingly observed on the surface of the cuticle.
