40 
type, and it may be that these worms in such number 
predisposed to the death of this animal. Along with the 
filarial worms they might easily have done so. The 
other two species of tapeworms conform to none so far 
described in any system, and probably represent new 
species. 
The question of most interest is: Which caused the 
death of the animals, the enteritis or the worms?" The 
intensity of the inflammation of the intestines in two 
cases which I saw left no doubt as to the cause of death 
in those two cases. The animals were fresh, and no 
decomposition had set in, yet the mucosa was almost 
black in patches, so marked were the hemorrhages. 
These two cases were, in addition, heavily infested with 
worms which were found in lungs, blood, intestines, 
stomach and thigh muscles. One of the animals had 
been in the gardens only eleven days; half a dozen other 
cases were here from 15 to 30 days. This is too short a 
period in which a mature worm may develop, and the 
facts are of importance when one considers that nearly 
all the cats came almost directly from the wild to the 
Garden. It is probable that for the last fourteen 
animals, not over one month, probably less, elapsed 
between capture and receipt at the Garden. The 
worms must have been brought in with the animals and 
it does not seem reasonable that the worms should sud- 
denly in from 15 to 30 days become virulent and so 
regularly kill the animals. What does seem reasonable 
is that, even in nature, these worms (especially the 
filarioe) have a depressing influence on the vigor of the 
animal; that this depressing influence is increased by 
the new environment with its constant frightenings and, 
perhaps, new kind or quantity of food; that some in- 
fectious agent, maybe relatively innocuous, now entering 
finds a non-resident host in which it develops. The fore- 
going expresses the rationale of the condition well known 
amongst physicians as "status resistentice minorisJ^ 
