Pachydermata (păk´ĭ-dẽr-mȧ-tȧ).—A group of hoofed mammals distinguished for the thickness of their skins, including the elephant, hippopotamus, rhinoceros, tapir, horse, and hog.
Pelagic (pē-lăj´-ĭk).—Living on the high seas, away from the coast; in mid-ocean.
Polyp (pŏl´ĭp).—Separate coral animals.
Protoplasm (prō´tō-plāz’m).—The albuminous, elementary matter forming cells and the body-substance of Protozoa.
Protozoa (prō´tō-zō´ȧ).—The lowest forms of animal life.
Pupa (pū´pȧ).—The third, or usually quiescent, chrysalis stage of insects.
Paleontology (pā-lē-ŏn-tŏl´ŏ-gy).—The science of ancient beings or creatures; applied to the science of the fossil remains of animals and plants now extinct.
Quadrumana (kwŏd-rōō´mȧ-nȧ).—Monkeys.
Quadruped (kwŏd´ru-pĕd).—Four-footed animals.
Radiates (rā´dĭ-āts).—Animals having a central mouth, around which the body forms a star-shaped figure.