262 ENCEPHALOID CANCEROUS DISEASE IN A RIG PONY. 
surrounds. There are very considerable masses of clotted blood 
on each side of the central line against the psose muscles, 
which are in an atrophied condition these clots separate the 
muscles from the upper surface of the tumour. A fracture ex¬ 
tends through the neck of each ileum transversely; the blood¬ 
vessels in connection with this are ruptured. The clot ex¬ 
tends backwards into the pelvis. The morbid deposit invades 
the psoae muscles and surrounds the posterior aorta, and 
extends a little way beyond its bifurcation. The growth 
presents every phase of development, from the softened con¬ 
dition to the hard consistent mass of recent deposit, and 
some of it bulges into the posterior vena cava. The right 
ureter is considerably enlarged and runs into the right side of 
the mass, by which it is surrounded, and which seems to have 
completely embedded its walls, for if we expose the portion 
of it situated within the tumour we find the canal dilated and 
the walls irregular. The right kidney is not unusually large. 
The left contains a viscid gelatinous fluid, and is mainly occu¬ 
pied by three large cavities; it lies firmly against the tumour 
substance but is not invaded by it; it is extremely small; 
its ureter is very dilated at its commencement, and passes 
slightly into the mass of the tumour, presenting a similar 
arrangement to that of the opposite side; shortly, however, it 
becomes completely blocked up. Section through the centre 
of the tumour shows that it has a fibrous stroma, the loculi of 
which are occupied^ the central ones by a substance resem¬ 
bling palm butter, the outer present the ordinary encepha- 
loid appearance. The left testis, which is in the abdominal 
cavity, has its structure completely broken down; on section 
it presents a variously coloured surface, especially dark 
towards the centre, and anteriorly traces of calcareous de¬ 
posit ; it is about eight inches in length, and of a correspond¬ 
ing breath and thickness. From its lower extremity hangs a 
double lobulated mass, the inferior division of which is com¬ 
mencing to undergo a caseous change. The surface of the 
organ is not materially altered in outline, but is covered with 
small lobular growths. The epididymis is very much enlarged 
and diseased in a manner somewhat similar to the corre¬ 
sponding testicle; this enlargement extends throughout the 
structure of the cord for a distance of about eight inches. The 
anterior extremity of the epididymis and the anterior part of 
the cord are the principal seats of disease. I am inclined 
to think that the disease primarily existed in the testicle for 
some time; from thence it extended through lymphatics of 
the cord to the sublumbar glands, the disease of the kidneys 
being purely secondary. The character of the sublumbar 
