580 DISEASE IN WILD MAMMALS AND BIRDS 
course of bronchi in loAver lobe, lung tissue is distinctly more boggy than 
elsewhere. On section this area is slightly paler and more granular than 
the rest of the lung. Lung is everywhere slightly edematous. The 
bronchial lymphatics are swollen, pale pink and edematous. The heart 
is dilated acutely judging fi'om the left ventricle wall which is nowhere 
over 1 cm. The liver is slightly enlarged, surface smooth, edges sharp, 
color deep purple, section surface very bloody. The spleen is soft, 
capsule smooth, pulp homogeneous purple, follicles not visible, trabecu- 
lae normal. The kidney is slightly large, capsule smooth, strips easily 
leaving purple surface. The cut surface swells out, has irregular striae, 
congested lines between, glomeruli visible and large. Smear from centre 
of tongue muscle shows staphylococci in some places in colonies, and 
long, slender rods. 
The following case is one of gastric, intestinal and 
hepatic involvement, apparently primary, the last pos- 
sibly arising by a hematogenic or lymphogenic route. 
Judging by the slides of the gastric wall the process 
started deeply and broke through the mucosa. This can- 
not be asserted definitely since kangaroos are susceptible 
to gastritis so that the streptothrix may have been 
implanted upon a preexisting inflammation. 
Black Wallaby {Macropiis ualabatus). Congestion and edema of 
lungs, abscess of stomach and liver (streptothrix), ulcerative enteritis, 
necroses of spleen and lymph nodes, congestion of kidney. The animal 
is thin, hair loose. The mouth and nose seem to be absolutely healthy. 
The weight of the lungs is increased by congestion, thej' are solid, 
homogeneously red, with no air in any lobe except at edges. A piece 
cut from centre of lung sinks quickly in water. The trachea contains 
frothy blood. The heart muscle is soft, flabby and lustreless, chambers 
dilated, valves normal. The liver is of normal size, firm, smooth sur- 
face, sharp edges, red brown color. The small sublobe of the liver 
which lies between the gall-bladder and the pyloric end of the stomach 
shows a large abscess 4x3 cm., apparently starting in the substance 
of the liver via the bile ducts. This is certainly not extension from 
the stomach abscess as the liver lying against the stomach is nearly 
normal. The abscess is sharply circumscribed with a zone of conges- 
tion about it. Aside from congestion the rest of the liver is normal. 
The common bile duct is large and freely patulous. The capsule of the 
spleen is thick, consistency firm, pulp deep red, irregularly mottled by 
pale areas of necrosis. The kidney capsule is smooth, strips easily 
leaving a smooth, brown surface. The organ is firm. The section sur- 
face is glistening, the cortex wide and congested, the medulla normal. 
The adrenal medulla is deep purple with congested line between it and 
the pale cortex. Most of the gastric mucosa seems good. At about 
