NINTH ANNUAL REPORT. 157 
usual ascending degeneration above. Aside from this the cord 
seems to have been normal and the cause of the myelitis is not 
apparent. 
CASE III. 
Vervet Monkey (Cercopithecus lalandi)—The animal pre- 
sented the general clinical manifestations of cage paralysis. Six 
weeks elapsed between the time of the first observation of the dis- 
ease and the death of the animal. During this period the monkey 
emaciated moderately and progressive atrophy of the rear extrem- 
ities have become marked. 
The autopsy, which was performed by Dr. Blair, showed mod- 
erate general emaciation with marked atrophy of the hind ex- 
tremities from the pelvis down. There was a large deep indolent 
appearing ulceration of the tissues over each tuberosity of the 
ischium. The heart was in diastole and normal. The /ungs were 
normal. The liver was congested. The kidneys were moderately 
congested. The bladder was well filled with urine and was other- 
wise normal. The stomach, pancreas and intestines were normal 
throughout. Brain and Spinal Cord.—Gross examination shows 
no lesions in either brain or cord. 
MICROSCOPIC EXAMINATION. 
Cervical Cord.—Microscopically, the spinal cord in the cervical 
region shows a considerable number of degenerated fibers in the 
direct and crossed pyramidal tracts and in the antero-lateral tracts. 
Degenerated fibers are also found in the anterior nerve roots. 
Examination of the ganglion cells of the anterior horns shows 
very marked atrophy, in many cases amounting to actual cyto- 
clasis. Others of the cells are elongated, the chromatic plaques 
are missing and the cells show atrophy to a marked degree. 
Dorsal Cord.—The descending degeneration present in the cer- 
vical segments is also present in the dorsal cord, and in addition 
occasional degenerated fibers are present in the columns of Goll 
and Burdach. The ganglion cells of the anterior horn in these 
levels show also the same marked degeneration as was found in 
the cervical regions, but the degenerated cells are much more nu- 
merous here than in the cervical levels. Sections of some of the 
posterior root ganglia from these levels show atrophy of certain 
cells, together with the degeneration of some of the fibers orig- 
inating in the ganglia. The nerve trunks surrounding the cord 
show a good many degenerated fibers. 
