EXPLANATION OF PLATE X.

TWO SPECIMENS OF BAR AT THE NECK OF THE BLADDER.

The upper figure represents a preparation in the Museum of the Royal College of Surgeons, London, and I am indebted to the Council for permission to represent it here.

It is a well-marked specimen of prostatic bar, and is thus described in the Hunterian Catalogue: "Prep. No. 2488. Part of the bladder with an enlarged prostate gland. The enlargement has taken place chiefly in the middle lobe, which is raised in a broad thick transverse ridge or bar behind and below the vesical orifice of the urethra. The anterior surface of this ridge forms nearly a right angle with the rest of the prostatic part of the urethra."

The lower figure is that of a preparation in the Museum of University College, presenting a good example of bar produced, not by enlarged prostate, no such affection existing, but by hypertrophy of the muscular and fibrous structures at the neck of the bladder, induced by their action to overcome obstruction in the form of long-standing stricture of the urethra. See pp. 304-5.

Referred to at pages 171, 240, 299, and 304-5.

EXPLANATION OF PLATE XI.

ABSCESS OF THE PROSTATE.

The bladder, prostate, and a part of the urethra, drawn while fresh from a subject who died with abscess of the prostate. The parts form a preparation now in possession of the Author. The case is reported at length, pp. 76-8.

The sac of the abscess formed a cavity capable of containing ten or twelve drachms of fluid. It undermined the mucous membrane of the urethra, opening into the canal by an aperture the size of a florin, situated in the upper part; thus the floor of the urethra alone remained, forming a kind of bridge through the cavity, which extended below, above, and on either side of it. This cavity is bounded by the capsule of the prostate, nearly all the substance of the organ having disappeared. Passing through the cavity is the right ejaculatory duct, found to be dissected out entire.

Referred to at p. 79.