History of All Animals. 21

The letters marked on the skeleton of the pelican are explained as follows:

**A.** The lower jaw, which exceeds the upper jaw by the length of a palm, as it originates from the inner part of the head.

**B.** The pouch, or fish-reservoir, which is of such great capacity that even when dried it can hold an inserted foot. it consists of a double membrane equipped with every kind of fiber; these contract to narrow the pouch and stretch to dilate it.

**C.** The upper jaw, three fingers wide and two spans long.

**D.** The tip of the beak, curved like a hook.

**E.** The upper end of the esophagus, which is connected to the pouch.

**F.** A portion of the hyoid bone.

**G.** The skull.

**H. H. H.** The cervical vertebrae of the neck.

**I.** The sternum (breastbone).

**K.** The left collarbone.

**L.** The right collarbone.

**M.** The left shoulder blade.

**N.** The right shoulder blade.

**O. ooooo.** The cartilaginous ends of the sternum, which are joined to the ends of the ribs.

**P.** The upper part of the right wing, also called the humerus.

**Q. R.** The middle part of the wing, where **Q** designates the ulna and **R** the radius.

**S.** The lower part of the wing, which corresponds to the hand; its first part denotes the carpus, the second the metacarpus, and the third the digits.

**T. T.** The sacrum, to which the innominate bones of the pelvis are attached at the sides.

**V. V.** The uropygium (tail-base), divided into vertebrae.

**X. X.** The right and left femurs, which are called the first parts of the leg.

**Y. Y.** The second part of the leg, shown here covered with skin.

**Z. Z.** The third part of the leg, called the foot, furnished with its own skin and claws, with the webbing running between the toes.