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opper (Bocydium tintinnabuliferum), remarkable for the four bell-shaped appendages of its thorax.

s, characterized by a small and short abdomen, which is bent up beneath the large cephalo-thorax. [Also spelt Brachyoura.] See Crab, and Illustration in Appendix.

Either one of the protuberant glands, 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.

e included between the head and waist, whether in statuary or in the person; the chest or thorax; the upper part of the trunk of the body.

The part of the body inclosed by the ribs and breastbone; the thorax.

together; closely connected; -- applied to insects having the abdomen separated from the thorax only by a constriction. Coarctate pupa (Zoöl.), a pupa closely covered by the old larval skin, as in most Diptera.

The thorax of an insect.

Relating to a costa, or rib. Costal cartilage. See Cartilage, and Illust. of Thorax.

Having the prothorax elevated so as to form a sort of hood, receiving the head, as in certain insects.

(Acherontia atropos), so called from a figure resembling a human skull on the back of the thorax; -- called also death's-head sphinx.

Having the head, thorax, and abdomen separated by a deep constriction. Disjunct tetrachords (Mus.), tetrachords so disposed to each other that the gravest note of the upper is one note higher than the acutest note of the other.

An instrument for intensifying sounds produced by percussion of the thorax. Knight.

g a sudden upward spring, by a quick movement of the articulation between the abdomen and thorax; -- called also click beetle, spring beetle, and snapping beetle.

A chitinous structure above the nervous cord in the thorax of certain Crustacea.

One of the lateral pieces next to the sternum in the thorax of insects.

s on the head of a bird, as in the horned owl. (c) A hornlike projection from the head or thorax of an insect, or the head of a reptile, or fish. (d) A sharp spine in front of the fins of a fish, as in the horned pout.

In the thorax.

The anterior segment of the thorax in insects. See Insect.

cifically, the folds of the pleura (and the space included between them) which divide the thorax into a right and left cavity. The space included between these folds of the pleura, called the mediastinal space, contains the heart and gives passage to the esophagus and great blood vessels.

The dorsal portion of the mesothorax of insects.