156 NEW YORK ZOOLOGICAL SOCIETY. 
show no degenerated fibers in the pyramids, but a few are present 
among the arcuate fibers and in the neighborhood of the nucleus 
gracilis and cuneatus. A few degenerated fibers are also 
present in the fillet. There is general dilatation of the lymph 
spaces. 
Cervical Cord.—The lymph spaces are generally dilated, but 
otherwise the general structure is not altered. Sections prepared 
by the Busch-Marchi method show a great many degenerated 
fibers in the posterior tracts, particularly in the column of Goll. 
The most radial fibers in Burdach’s tract do not seem to be 
affected. There is also a marked general degeneration in the 
fibers of the direct cerebellar tract and a few scattering degen- 
erated fibers in the antero-lateral tract, also an occasional one in 
the direct pyramidal and in the anterior ground bundle. 
Sections stained by the method of Neisl show a general chroma- 
tolysis in the cells of the anterior horns; the alteration is so gen- 
eral that it is likely largely due to post-mortem changes. 
Dorsal Cord.—Sections through the upper dorsal levels show 
alterations similar to those found in the cervical segments as 
regards the degenerated tracts, except that the column of Burdach 
is relatively more involved. 
The mid-dorsal region presents an area of myelitic softening in 
which all the structures of the cord are extensively necrosed and 
the entire mass is permeated by extravasated blood mingled with 
broken-down masses of myeline. 
The lower dorsai segments show extensive degeneration of the 
direct and crossed pyramidal tracts and numerous degenerated 
fibers in the anterio-lateral and the anterior ground bundle; a few 
scattering degenerated fibers are also present in the posterior 
tracts, but these columns are in general free from degenerations. 
The blood vessels in the grey matter are quite extensively con- 
gested and areas of myelitic degeneration are frequent. 
Lumbar and Sacral Cord.—The degenerations present are al- 
most exclusively limited to the descending columns. 
Posterior Root Ganglia—No alterations are evident above the 
level of myelitis. Ganglia corresponding to the area of soften- 
ing show a few small patches of cellular exudation and a shrink- 
age of some of the ganglion cells. 
Blood Vessels.—The blood vessels throughout the spinal cord, 
with the exception of the area of softening, show no apparent 
changes. 
The case is clearly one of transverse myelitis of the mid-dorsal 
cord with the descending degenerations below the lesion and the 
