In the Bandicoot rat, the surface of the tail is covered with flat scales and the body with coarse hair.

The skin of Porcupine

    The porcupine possesses strong stiff quills, which can be erected and serve as efficient organs of defence.

    The longitudinal section of the skulls of man, horse and elephant illustrate comparatively large size of the skull of the horse, its brain cavity is considerably smaller than that in the human skull, illustrating the relatively greater development of the brain in man.