Called also Callus. If the falx is cut away from the crista galli, turned backwards, and the two lateral parts of the cerebrum gently separated, we see a longitudinal portion of a white convex body, named corpus callosum, which is the middle portion of the medullary substance of the brain: under the inferior sinus of the falx, and also a little towards each side, it is parted from the mass of the cerebrum, to which it is simply contiguous from one end of that sinus to the other; so that at this place the edge of the inside of this hemisphere only lies on the corpus callo-sum, much in the same manner as the anterior and posterior lobes lie on the dura mater. Both extremities of this medullary body terminate by a small edge bent transversely downwards. The surface of the corpus callosum is covered by the pia mater; along the middle of its surface, from one end to the other, there is a kind of raphe, or seam, which hath on each side a white chord. The corpus callosum covers the two lateral ventricles. See Cerebrum.

Corpus glandulosum. See Prostatae.

Corpus luteum. A yellow substance; sometimes, in the early period, a cavity found in the ovarium after impregnation. When there are twins, one is found in each, but scarcely ever two in the same ovarium. They continue some months, and are supposed to be the part from which the ovum has been separated. While the surrounding parts are filled by injection, a cavity is observed in the centre of this body.

Corpus mucosum. See Rete mucosum.

Corpus pampiniforme, pyramidale. The spermatic Chord. See Spermatica Chorda.

Corpus reticulare. See Rete mucosum.

Corpus sesamoideum. See Cor.

Corpus spongiosum urethrae. The spongy body of the urethra. It is of the same substance as the corpora cavernosa, and surrounds the urethra. That part which is next the prostate is thick, and styled the bulb of the urethra; but as it runs on, it becomes smaller, and at the extremity forms the gland.

Corpus varicosum. See Spermatica chorda.