592 DISEASE IN WILD MAMMALS AND BIRDS 
tells the whole story, no adequate explanation being 
at hand. 
Red Kangaroo {Macropus rufus). Disease of the mouth first 
noticed March 31, 1912, died September 13, 1912. Necrotizing osteitis, 
arthritis and periarthritis of left ankle, subacute fibrinous right pleuri- 
tis, hemorrhagic bronchitis with atelectasis in right middle lobe, abscess 
of right middle lobe; passive congestion of lungs, liver, kidney, chronic 
splenitis, chronic general lymphadenitis. The animal is in general 
good condition except for a fusiform swelling about the left heel with 
evidence of fracture. The necrotic process in the hare lip, nose and 
palate has entirely disappeared. One front incisor has gone and the 
other is loose. There is a scar on the under part of the soft palate 
in a small healed channel between palate and floor of nose. There 
is no evidence of pyorrha'a. Cervical and axillary lymph nodes are 
much enlarged, pale yellow, firm and of the appearance like early 
stages of Hodgkin's disease. Fascias of cavities congested. The lungs 
are mottled purple, air content decreased, section surface purple, 
exuding frothy blood. The Avhole right lung is covered with a thick 
fibrinous exudate, most intense over middle lobe at site of atelectasis. 
There are light scattered adhesions. The anterior margin of the lung 
is adherent to the pericardium which is covered in the front by exudate. 
Upper and lower lobes show hypostatic congestion. Middle lobe has 
separate bronchus filled with necrotizing blood clot extending into a 
smaller bronchus with complete occlusion. The alveoli supplied by the 
last show atelectasis like hemorrhagic infarct. There is a small sub- 
pleural abscess near the margin of this atelectatic area. The bronchial 
lymph nodes are slightly enlarged, mottled yellow and pink, firm with 
large, diffuse follicles. The pericardium contains 2-3 cc. clear fluid. 
The heart muscle is pale, purple and soft. All the vessels are full of 
currant jelly clot. On the posterior surface of the aorta internally about 
an inch above the valves there is a patch of roughening with a sugges- 
tion of thickening and opacity. It is comparable to the early stages 
of syphilitic aortitis. The liver is normal in size, surface smooth, edges 
sharp, consistency firm and friable, color purple. The section surface 
is glistening, smooth, moist, and shows passive congestion. The gall- 
bladder contains fluid brown bile and the common duct is patulous. 
The spleen is slightly enlarged, firm and tough, capsule wrinkled. Sec- 
tion surface is mottled red and purple with irregular gray trabeculaB 
and faint scattered follicles with diffuse margins. The kidney capsule 
is smooth, strips easily leaving a smooth brown surface. Organ is 
firm. The section surface is glistening Avith a line of passive congestion 
with distended vessels between the cortex and medulla which are of 
normal widths. Intestines seem normal throughout. The pancreas is 
firm, pale pink, slightly edematous. The mesenteric lymph glands are 
moderately enlarged, yellow, firm, homogeneous with congested centres. 
About the left ankle joint there is a necrotizing infection which has 
