Armored animals / Zim, Herbert Spencer

Describes some armored animals, such as the one-celled protozoa with a hard covering, the armadillo, and shellfish, and compares the effectiveness of this armor to other forms of animal protection.

Describes some armored animals, such as the one-celled protozoa with a hard covering, the armadillo, and shellfish, and compares the effectiveness of this armor to other forms of animal protection.

Describes some armored animals, such as the one-celled protozoa with a hard covering, the armadillo, and shellfish, and compares the effectiveness of this armor to other forms of animal protection.