PROGRESS OF VETERINARY SCIENCE AND ART. 659 
vessels which enter the porta ; it is between the porta and 
posterior vena cava; it constitutes an opening of one or two 
inches in breadth into the omental sac. Through it, some- 
times, a portion of the small intestine passes, and becomes 
strangulated and gangrenous. Hering says that, so far as he 
can remember, Prinz, of Dresden, first drew attention to this 
lesion. In the dog, the foramen of Winslow is larger in pro- 
portion, and admits of three fingers being passed into it. — 
Loo. Cit ., p. 38. 
Hering has described the analogue of the cremaster in the 
mare. It is a distinct, slender, brownish-red muscle, begin- 
ning at the insertion of the broad ligament (just where, in 
male animals, the abdominal ring exists), and stretching 
within this fold to the ovary on the same side, the ovary 
naturally being the analogue of the testicle. — See the Leper- 
torium der Thierheilkunde , xvii, p. 16. 
The inguinal canal in pregnant hitches . — According to Pro- 
fessor Muller, the round ligament of the uterus does not go 
only to the internal abdominal ring, but through the ab- 
dominal muscles (inguinal canal in male animals), and is lost 
in the subcutaneous cellular tissue ; it draws with it the peri- 
toneum, so that a reflection of this membrane is formed, 
analogous to that which descends in the shape of the tunica 
vaginalis round the testicle, and in the cul de sac thus formed 
a horn of the uterus may lie. If this becomes pregnant it 
gets further through the opening, and becomes subcutaneous. 
A few years back, Dr. Roll described a case of such a hernia 
of the uterus before the Academy of Medicine of Vienna. 
About the years 1832-33, my father saw a case of this kind 
in a bitch, the property of a Russian nobleman then passing 
through Florence. One pup was born dead, but per vaginam. 
It was supposed the bitch had other pups to be delivered of, 
but no physical exploration was made. On the fourth day 
from this time, she was first taken in labour, it was observed 
that she constantly licked the inside of her thighs. My 
father had been called in, and, on closely examining the bitch, 
found that the integument was sloughing on the inside of the 
thighs, and the sloughing surface on these extended from 
three to four inches in length to one or two in breadth, and 
beneath was a solid enlargement indicating the presence of a 
foreign body. My father made an incision, and removed two 
dead pups, which he found closely packed together, and lying 
lengthways, with their heads downwards. The parts healed 
with surpris ng rapidity, and the bitch recovered. Professor 
Muller’s anatomical researches very fully explain this inte- 
