26 The Management and Diseases of the Dog. 
through the mitral valve with the one in the auricle, while 
a prolongation from it extends into the aorta. 
“ Lungs.—After removal, on inverting them, a quantity 
of dirty brown frothy fluid escapes through the larynx. 
“The anterior and middle lobes and the anterior half ot 
the posterior lobe of the right lung are solidified, being of a 
dark reddish-brown colour, and contrasting strongly with 
the unaffected parts. The pleural surfaces are smooth, and 
there is no exudation. On section the lung-tissue is of a 
dark red colour, the surface of the section finely granular, 
and bathed with a quantity of reddish-brown serum. On 
close inspection it is seen that the air-cells are uniformly 
filled with a solid exudation ; attempts at inflation of the 
affected portions with’ air are unsuccessful. Portions ex- 
cised sink at once when placed in water. In the left lung 
the apex of the anterior lobe, the whole of the middle, and 
the root of one of the posterior lobes are in the same con- 
dition. The portions of the organs not diseased are of a 
rosy red externally, and on section contain much blood 
and frothy serum. Between the healthy and diseased 
parts there is a zone of intense hyperzmia. 
“ Trachea —On slitting up the windpipe the mucous 
membrane is found covered with a dark frothy mucus. The 
membrane looks pale and natural to within an inch of the 
bifurcation, but at this point it becomes reddened, and un- 
even from the projection of irregular little masses of a 
greyish-yellow colour, which on close inspection are found 
to be localised swellings of the membrane, containing small 
parasitic worms, the white bodies of which can be seen 
lying upon and partially imbedded in these elevations. 
They are most abundant just at the bifurcation, at the 
lower part of which several have emerged, forming an 
elevation three or four lines in height. About the orifices 
of the second divisions these little masses are also seen, and 
the whole mucous membrane of this region is deeply con- 
gested, and somewhat swollen. Very few of the worms 
