Serpents are covered with horny scales; Crocodiles and Tortoises have a bony covering.

They may have naked skins, or be covered with horny scales, or bony plates, or with both.

His jet black tail, which is like a large paddle, covered with horny scales, he uses in many ways.

As regards the bird's feathers, it is certain that they are modifications of the horny scales of their reptilian ancestors.

In passing from aquatic to terrestrial life the horny scales were further developed, and the bony scales degenerated in most of the reptiles.

In one square inch of the cuticle, counting only those in a single layer, there are over a billion horny scales, each complete in itself.-HARTING

I see a whole school of them together, all one colour, and covered with spines and horny scales, as tempting to handle as a hedgehog.