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The highest class of Vertebrata. The young are nourished for a time by milk, or an analogous fluid, secreted by the mammary glands of the mother.

Of or pertaining to the Mammalia or mammals.

Animals having two hands; -- a term applied by Cuvier to man as a special order of Mammalia.

ands, situated on the front of the chest or thorax in the female of man and of some other mammalia, in which milk is secreted for the nourishment of the young; a mammma; a teat. My brother, that sucked the breasts of my mother. Cant. viii. 1.

An order of mammalia, including the bats, having four toes of each of the anterior limbs elongated and connected by a web, so that they can be used like wings in flying. See Bat.

ous body] (Anat.), the reddish yellow mass which fills a ruptured Grafian follicle in the mammalian ovary. -- Corpus striatum (str; pl. Corpora striata (-t. Etym: [NL., striate body] (Anat.), a ridge in the wall of each lateral ventricle of the brain.

A group of Mammalia in which a decidua is thrown off with, or after, the fetus, as in the human species.

An order of Mammalia; the Cheiroptera. [Written also Dermaptera, and Dermatoptera.]

The subclass of Mammalia which includes the marsupials. See Marsupialia.

The higher orders of Mammalia, in which the cerebrum is convoluted. -- Gyr"en*ceph"a*lous, a.

An extensive division of Mammalia. It formerly included the Proboscidea, Hyracoidea, Perissodactyla, and Artiodactyla, but by later writers it is generally restricted to the two latter groups (Ungulata). They feed almost exclusively upon vegetation.

A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed.

A group of Mammalia, including the marsupials and monotremes; - - so called because the corpus callosum is rudimentary.

One of the Mammalia. Age of mammals. See under Age, n., 8.

Containing mammalian remains; -- said of certain strata.

The science which relates to mammals or the Mammalia. See Mammalia.

A mammal. See Mammalia.

Having breasts; of, pertaining to, or derived from, the Mammalia.

A subclass of Mammalia, including nearly all the mammals of Australia and the adjacent islands, together with the opossums of America. They differ from ordinary mammals in having the corpus callosum very small, in being implacental, and in having their young born while very immature. The female generally carries the yo…

The natural history of Mammalia.