THE RESPIRATORY SYSTEM 145 
supporting pulmonary tension, accununulation of secre- 
tion and the dilating effect of inspiration preparatory to 
and incidental to coughing. How important the last 
three auxiliary factors may be in the cases explicable 
under a, b, c, can easily be speculated upon and may vary 
in different cases. 
Bronchiectasis is reasonably common with pulmonary 
diseases of man, particularly of chronic character, but 
is certainly not frequent among animals. Under the first 
group (a) we can record one case, a Siberian tiger wliich 
died of enteritis and its complications to which were added 
a mild inactive bronchitis and a bronchiectasis of diffuse 
distribution. The lungs were irregular in shape, dull, 
gray red in color and gave a variable boggy and vesicular 
sensation to the fingers. On opening the lung, dilatations 
of the bronchi were found, affecting chiefly the larger 
secondaries but apparently not the bronchioles. Para- 
sites were not found nor were inflammatory reactions 
apparently adequate to explain the distentions, so that we 
looked upon this case as congenital. Gases coming under 
the headings b and c are not recorded. Inflammation 
almost certainly represents the most important single 
factor in the pathogenesis of this lesion and could be 
demonstrated in two cases, a Clouded Leopard (Felis 
nchulosa) and a Red River Hog {PotamochcErus porcus). 
While I feel that parasites probably laid the foundation 
for the dilatations in these cases, none were found after, 
in one case at least, a very thorough search, although in 
the second animal a single cyst of Cysticercus tenuicollis 
was found in the peritoneum. Jn both animals there was 
a low grade interstitial pneumonitis and peribronchitis 
with dilatations of the middle sized and end bronchi, these 
being supplied with thick walls but containing very 
scanty secretion. 
We have on record chronic ulcerative pulmonary 
tuberculosis in six primates, two carnivores and nine 
ungulates. It is highly probable that among this number 
