CONSTITUTIONAL DISEASES 413 
to rely upon great thirst, loss of flesh, depression, exces- 
sive urination and possibly cataractous opacity of the 
eye. Such a chain of symptoms has not been detected. 
At every occasion at postmortem that the bladder is full 
of urine, a routine examination is made. In this way we 
detected one case which seems to have been diabetes, the 
diagnosis being based upon the glucosuria and the 
lipemia. For some unknown reason a section of the pan- 
creas was not made, a regrettable matter since a definite 
purulent gingivitis existed and may have lain at the basis 
of an infective pancreatitis, well known to be the cause 
of certain cases of diabetes. The case is recorded in full 
since it is unique, no other case in a wild animal being 
fully reported. 
The arctic fox [Canis lagopus) ate and appeared well the day 
before it was found dead. Diagnosis — Diabetes mellitus. The animal 
was in good condition. The left conjunctiva was reddened, congested, 
edematous, with slight mucopurulent discharge in canthus. Muscles 
have a cloudy appearance. Fat lacks rich yellow color. The general 
impression of anemia is present. Lungs and pleura are normal through- 
out. Heart muscle is pale, firm and tough. The tricuspid shows 
thickening of the edge of posterior leaflet, the mitral shows slight sclero- 
sis of edge of mesial leaflet. The auricles are distended with clot. 
Left ventricular wall is greatly thickened. Upon incising the heart 
the surface of blood shows fine fat globules. Peritoneum is normal. 
Liver is slightly increased, surface smooth, edges rounded, consistency 
soft, color brownish red with yellow mottlings which are without defi- 
nite boundaries ; the section surface is moist, granular and opaque. The 
bile is fluid, green-yellow and the duct is patulous. The spleen is 
slightly enlarged and soft. The kidney is slightly enlarged, capsule 
strips easily leaving a smooth, purplish red surface; section surface 
is glistening, moist and exudes blood; consistency is slightly softened; 
cortical striee very distinct. The bulging cut surface and poor demarka- 
tion of cortex and medulla characteristic. of acute nephritis are present. 
The organ shows fat globules in the expressed blood. The adrenals 
are very small, firm, brown, bean-shaped bodies with a brownish medulla. 
The bladder is slightly distended with turbid urine. Urine shows dark 
granular casts, compound granule cells, spermatozoa and a positive 
Fehling's test. Prostate is large and firm and a turbid material exudes 
from external meatus. The mouth shows several decayed teeth. In 
the neighborhood of last molars on left side of upper jaw a bead of pus 
exudes; further pressure results in no greater flow. The stomach is 
