ON THE PATHOLOGY OF SHEEP-POX. 208 
4. About the third day after the appearance of the pock 
the contents of the dilated lymphatics begin to exhibit 
characters which are not met with in ordinary exudative pro- 
cesses. These consist in the appearance in the granular 
material already mentioned, of organized bodies, which 
neither belong to the tissue nor are referable to any anato- 
mical type—viz. of spheroidal or ovoid bodies having the 
characters of micrococci and of branched filaments. In 
fig. 4 a lymphatic vessel of the corium is seen in section filled 
more or less completely with micrococci. In some parts the 
spheroids are aggregated in the zooglea form, so that the 
mass appears granular, in others it presents a filamentous 
aspect, the spheroids being in necklaces or chaplets. In the 
upper part of the figure a blood-vessel (c) is shown in section 
which is sheathed in the lymphatic channel, at (d) a valve is 
shown with masses of micrococci on either side of it ; (40) in- 
dicate interfascicular channels containing connective-tissue 
corpuscles. In fig. 5a similar lymphatic vessel of the corium 
TGs 5s Fie. 6. 
is represented, of which the contents have the characters of a 
mycelium, and consist of branched filaments. In fig. 6 the 
same structure is seen, but the interlacing of the filaments is 
