How well Charlie has drawn his! He has both the little segments.

The one next the body we will mark I, and we will call it the coxa.

The next little one we will mark II, and that we will call the trochanter.

The long, strong one, III, we will call the femur.

The next one, long and narrow, we will mark IV, and call the tibia.

All the rest of the leg, made of several short segments, we will call the tarsus, and we will mark it V.

Now how are we to remember all those hard names?

Here is a jingle that perhaps will help us:—

Coxa first, and then trochanter,
Number three the femur stands,
After this, the long, straight tibia,
And last of all the tarsus comes.