614 
THE VETERINARY SCHOOL 
a goose’s egg protruded from the anus, and, after some time, re¬ 
tracted of its own accord. The horse was brought to us for 
examination. We found that this tumour was a polypus which 
grew from the right wall of the rectum, and the connecting sur¬ 
face of which reached to the edge of the anus. The tumour 
was covered with healthy mucous membrane. It was easily re¬ 
moved, since only the back part of it was interwoven with the 
fibres of the sphincter ani. On examining it we found that its 
outer tunic was very similar to the muscular coat of the rectum, 
consisting of pale, thick, fleshy fibres. The interior contained 
a quantity of soft matter of the colour and consistence of whey. 
These peculiar polypi of the rectum, which consist in hollow 
tumours filled with different kinds of fluid, are not unfrequently 
productive of very bad consequences to the horse. 
Difficulty of Urine, caused hy Stones in the Urethra. —A 
seven-year-old cavalry horse was brought to us which had suf¬ 
fered severely for more than three days from retention of urine. 
On examining him I found that the bladder was immoderately 
full, and that the urethra was obstructed by a round hard sub¬ 
stance, which was situated about three inches from its aperture. 
Finding it impossible to extract this substance in the usual 
manner, we cut through the urethra unto this body, and, by that 
means extracted a yellow calculus weighing a hundred grains, and 
the surface of which was very irregular. This being removed, 
the horse became free from pain ; the difficulty of urine was 
removed, and, ten days after the operation, the wound was per¬ 
fectly closed. 
A truck dog died in consequence of the bladder being distended 
with calculi to such degree that it burst, and the urine infiltrated 
even to the skin. 
An extraordinarily large bladder was brought to us as a curio¬ 
sity by a farmer, who stated that he had found it in an ox which 
he killed because it would not eat. This distention of the 
bladder appeared to us to be produced by retention of urine; we 
therefore requested permission to examine the urethra, and we 
found in it a very large stone. 
Ovarian Phthisis. —A fourteen-year-old brown mare having 
recovered from an attack of the prevalent bilious catarrhal fever, 
afterwards wasted rapidly away, and voided, from time to time, a 
slimy matter through the vagina. On post-mortem examination 
we found a collection of thin watery fluid in the belly, with thick¬ 
ening of the peritoneum and its prolongations; and the right 
cavity of the ovary, which communicates with the womb, was 
filled with thick matter. 
Jnversio?} of the Womb and of the broad Ligaments. —We have 
