THE CENTRAL NERVOUS SYSTEM 383 
which, if found in the human cord, would be looked upon 
as a proliferation process. In some cases these nuclei 
were heaped together in masses, and were evidently 
pathological. There was also, about the ganglion cells, 
some pericellular round cell infiltration, and this was 
more marked around a few cells which were almost 
entirely destroyed. The ganglion cells themselves were 
swollen. Some showed eccentric nuclei, and many of them 
stained poorly, while one or two showed distinct vacuo- 
lization. In one field a ganglion cell was partly destroyed 
by a recent hemorrhage. There were, however, a number 
of cells which appeared normal. This process seemed to 
be fairly distinct in the lumbar and cervical enlargements, 
but was not clearly demonstrated in the sections from 
the dorsal region. The cellular infiltration of the horns 
was evidently not leucocytic, but presented the appear- 
ance of a connective tissue proliferation. Although these 
are not the exact lesions found in poliomyelitis in the 
human animal, they are at least suggestive of the same 
process since the infiltrating cells are of the lymphatic or 
connective tissue types. There is no acute inflammatorj'' 
leucocytic infiltrate. 
A weeper cebus {Cebus capucinus) ever since he was 
received acted in such a peculiar manner, seeming to have 
only partial control of his movements, that he was known 
as the ''Crazy Monkey." There was no history of illness 
before death. Pathological diagnosis : Chronic entero- 
colitis, chronic adhesive pericarditis, early interstitial 
change in kidney, edema of lungs, meningitis and polio- 
myelitis. The pia of the paracentral cortex was 
thickened and was the seat of a round cell infiltration of 
moderate degree, the cells being of the mononuclear type. 
The blood vessels of the cortex were congested and the 
nuclei of the walls were increased. The round cell infil- 
tration of the pia had in some places extended into 
the cortical layers. The pia surrounding the medulla 
oblongata was also the seat of a slight round cell infil- 
