animal heat

The heat po e ed by the higher animals, and which, so long as they retain life, they maintain, whatever the surrounding temperature may be. It is highest in birds, and lowest in reptiles and fishes. animal kingdom, s . One of the three great kingdoms of visible Nature, the other two being the Vegetable and the Mineral Kingdoms. Cuvier divided the Animal Kingdom into four great sub-kingdoms-1, Vertebrata; 2, Mollusca; 3, Articulata; and 4, Radiata. Profe or Owen, in his Palæontology, adopts the following cla ification: Kingdom I. Pro tozoa. Kingdom II. Animal i a. Sub-kingdom I. Invertebrata: Province 1, Radiata; 2, Articulata; 3, Mollusca. Sub-kingdom II. Vertebrata. (See his Palæontol ., 1860.) Profe or Huxley divided the Animal Kingdom into eight distinct groups: -Vertebrata, Mollusca, Molluscoid a, Cælen terata, Annulosa, Annuloida, Infusoria, Protozoa. It is now generally admitted that no exact line can be drawn between the lowest animals and the lowest plants; and cla ifications of animals are based on the principle of descent from a common ancestor, the term phylum being used instead of Order . Scarcely any two authorities agree as to the number of these phyla or tribes; but the following is a good working division: PROTOZOA (forming one phylum); METAZOA: Phylum 1, Cælen terata 2, Echinoderm at a; 3, Vermes; 4, Arthropod a; 5, Molluscoidea; 6, Mollusca; 7, Vertebrata. animal magnetism, s . A science, or art, so called because it was believed that it taught the method of producing on persons of susceptible organisation effects somewhat similar to those which a magnet exerts upon iron. It is now generally denominated Mesmerism (q.v.) animal mechanics, S. [MECHANICS.]