656 en Goldfarb 
Left hind leg amputated eighty-nine days after paralysis. Ani- 
mal preserved forty-four days later. ‘There is no trace of the nerve 
cord not only in the tail and plexus, but for 54 mm. anterior to the 
later. Three pairs of spinal ganglia, cephalad to the first plexus 
nerve, are not connected with the nerve cord. ‘The condition of the 
leg nerves is interesting because the motor nerve fibers have degener- 
ated along their entire length from the cord to the amputated end. 
Near the latter level they have disintegrated completely. The 
sensory fibers however have degenerated but a short distance from 
the amputated level. This is in accord with the condition 
described in No. 1.58. ‘The left leg was amputated ez ghty-nine 
days after paralysis, a period sufficiently long to permit extensive 
degeneration of the nerve fibers. ‘The animal was preserved forty- 
four days thereafter, yet in this short interval the element of the 
new leg had been laid down. ‘There is one striking difference that _ 
distinguishes the nerve fibers of this limb from those of No. 1.27, 
in which the leg had been paralyzed and amputated at the 
Same time and preserved fifty-two days later, viz: the more rapid 
and profound breaking down of the fibers in the former instance. 
A similar difference is found in the two sides of 1.39. “The nerves 
in the left leg are only slightly less degenerate than those in the 
right, though the former had been amputated seventy-eight days 
after the latter. “These facts seem to indicate that when a leg was 
amputated a long period after the cord had been removed, its 
fibers degenerated much more rapidly than when the leg was cut 
off immediately after paralysis. 
No. 1.36. December, 16, 1907. Nerve cord removed from 
tail and plexus and further forward. Right hind leg amputated 
below knee. 
April 4, 1908. Right hind leg preserved, i. e., 110 days after 
operation. Left hind leg amputated for the first time. 
June 6, 1908. Left hind leg preserved, 173 days after paral- 
ysis and 63 days after amputation. Examination showed that the 
cord was ees in the tail, the plexus and farther forward; the 
plexus nerves were degenerate throughout their lengths. The right 
leg—second amputation—had grown 5 mm. long, contained 5 
well-formed toes, and was indistinguishable from the leg of control 
