This tumor is of a fibrous texture, and is distinguished from other and especially the pure, gluten-yielding fibroids, by its albuminous contingent.

The genesis of the fibres and their relation to the fluid albuminous blastema vary.

(a.) The fibre-texture becomes developed out of the fluid, that is the albuminous, blastema, according to the laws of the cell-theory.

(b.) The fibrous texture originates out of consolidated blastema, forming in this case a stroma, in whose interstices the fluid blastema is contained and becomes developed.

The fibre varies in all the forms derived from solid and fluid blastema. In particular, all the forms described under "Metamorphosis of Blastema," recur here as the stroma. Again, we have recognized in one of the forms specified in the section on "Gluten-yielding Fibroids," the transition from the latter to fibrous sarcoma.

Varieties of this sarcoma, dependent upon the form and arrangement of the fibres, might, accordingly, be numerously adduced. A frequent appearance in the albumino-fibrous sarcoma, is the formation of the cystic and alveolar texture.

Just as, in the gelatinous sarcoma it is the gluten-like blastema, - so it is a predominantly albuminous blastema with which the fibrous parenchyma becomes drenched, or, with which the gaps of the fibrous stroma, the cystic and alveolar spaces, become occupied.

The albumino-fibrous tumor, like the gelatinous sarcoma, occurs in areolar tissue, in the periosteum, especially the submucous periosteum; and in submucous and muscular strata of areolar tissue, as fibrous, pharyngeal, nasal, uterine polypi, etc. Moreover, it affects bones, especially those of the face, and, more rarely, glandular organs, the parotis, the mammary gland, the testicle. It is spherical, elliptic, single, or more often lobulated and ramified, more or less resilient, vascularized, turges-cent new growth, with a texture fibrous to the naked eye.