This appears on the peritoneum in the shape of the above-mentioned organizing processes of a plastic character, and especially as serous cysts, in which case the pseudo-membrane includes, during its organization, a portion of the fluid exudation, and receives an internal serous investment. Such bladders are either connected with the peritoneum by means of a neck or stalk, or adhere to it by a broad base. In rare cases we find cysts with various contents as new formations on certain portions of the peritoneum, and then most frequently on the omentum.

B. Anomalous Fibrous (Fibro-Cartilaginous) Tissue

Anomalous Fibrous (Fibro-Cartilaginous) Tissue - owes its origin to the inflammatory process in a similar manner as that above described. But there are, besides, other instances of the occurrrence of this tissue, in the shape of fibro-cartilaginous smooth or lobulated laminae, projecting granulations, etc, occupying the subserous layer of the peritoneum. They are observed in old hernial sacs; rarely, as compared with the pleura, on the parietal, but very frequently on certain portions of the visceral plate of the peritoneum, owing to the hyperaemia which takes place here, as, for instance, in the case of the spleen. This tissue also occurs in the subserous cellular tissue of the uterus and its appendages, and on the colon in the shape of a fibroid growth; in the former case, it reaches a considerable magnitude: in the latter, it rarely exceeds that of a lentil or a pea.

C. Anomalous Osseous Tissue

Anomalous Osseous Tissue - is developed from the above-mentioned tissue in the shape of compact, smooth, or uneven lobulated plates of varying thickness. The fibroid growth in the subserous cellular tissue of the intestinal canal is very rarely the seat of ossification.