Graphic illustrations of abortion and the diseases of menstruation / Consisting of Twelve Plates from Drawings Engraved on Stone, and Coloured by Mr. J. Perry, and Two Copper-plates from the Philosophical Transactions, Coloured by the Same Artist. the Whole Representing Forty-five Specimens of Aborted Ova and Adventitious Productions of the Uterus, With Preliminary Observations, Explanations of the Figures and Remarks, Anatomical and Physiological.

by A. B. Granville

REMARKS.

Instances of additional or pseudo membranes in aborted Ova are by no means of unfrequent occurrence. On one of the shelves in the Museum in Lincoln’s Inn Fields, I observed one marked 3443, in which a pseudo membrane has formed externally to the placenta, pressing on the cotyledons of the latter. The embryo is stinted. Upon another shelf I find No. 3442, with the nutritive as well as the secreting (amnion) involucrum thickened and pergamenous—the coat which they form being one twentieth part of an inch in thickness. The amnion, internally, is lined with a delicate pseudo-membrane. Here, also, although the entire Ovum is of such capacity as to admit about half a pint of fluid, the embryo has not acquired more than the size of an ordinary house-fly. The placenta is compressed and covered by an adventitious membrane, besides its membrana propria.

In Ruysch’s Thes. Anat. VI. Tab. II. Fig. 5, there is represented a specimen of human Ovum, with a pseudo inter-membrane, not unlike my present preparation; like it, too, it exhibits the cord hydropical.