turns for several weeks, but the little thickened mass still persists, with a small thread of a vessel running into it, though I fancy that even that grows smaller, slowly; vision has steadily improved, and the lid is quite normal.

I should add that the diagnosis of this most remarkable case, has been confirmed by my colleagues, and also by one of the most celebrated of the old school to whom I showed the case, who was very much surprised at the unique course the disease had taken.

CASE II.

Sub-retinal Tumor.

On the fifteenth of March, 1870, Mary McC., a child nine years of age, was brought to me with the meagre history, that, about a year previous, a slight drooping of the lid of the right eye was noticed, which had slightly increased. (Fig. 6.) No notice was taken of it until three months since, when it was accidentally discovered that the child could not see from that eye. She had suffered from enlarged glands and abscesses in the neck, the scars of which remained, but at the time I saw her seemed in excellent general health. I find in the right eye a partial ptosis and a divergent squint of about half a line (very slight). The movement of the eye seems perfect in all directions; there is no external congestion, nor inflammation; the pupil is sensitive to changes of light before the left eye, but sluggish to light and shade before its own eye; vision is for fingers only at eight inches.

Ophthalmoscopic examination revealed a remarkable tumor under or in the retina, which covered the macula lutea; vessels could be traced over the tumor, and small hemorrhagic spots were found around it; the size of the tumor equaled two diameters of the optic disk, and its elevation nine millimeters. The determination of the height of the tumor (viz., its projection into the vitreous body) was effected according to the table given by Prof. Knapp, in his work on introocular tumors, page 71 (German edition). The elevation of the tumor was confirmed by Prof. Knapp himself, to whom I showed the case. The illustration (Fig. 5) is taken from a drawing from nature, by an artist who is very skillful and practiced in such work (Mr. Gaertner).

The question at once arose as to the nature of the tumor. The general condition of the patient presented a picture of health; she had suffered no pain whatever in the eye, and only discovered the