. Half hours with fishes, reptiles, and birds . Fig. 63.— Heads of Snakes. The wonderful mechanism of the snake can best beobserved in the skeleton (Fig. 64), which is made upof many vertebrae, often three or four hundred, joinedon the ball-and-socket plan. This explains the flexi-. Fig. 64.— Skeleton of a Snake. THE SNAKES 99 bility of all snakes and the facility with which they windabout their prey, forming remarkable folds and knots.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1906