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 between the toad or frog (Fig. 250) and the "horned toad," which is a lizard (Fig. 265).

, of the Southwest (Phrynosoma cornita). × 2/3.

—Because of the ease with which a tortoise or turtle may be caught and their movements and habits studied, it is suggested that one of these be studied as an example of reptiles. Besides a live specimen, a skeleton of one species and the shells of several species should be available.

(Emys lutaria). (After Brehms.)

The body (of a turtle or tortoise) is divided distinctly into regions (Fig. 266). Is there a head? Neck? Trunk? Tail? The trunk is inclosed by the so-called shell, which