MICROSCOPICAL EXAMINATION OF MEASLED PORK. 91 
The matter has not, however, been discussed in the Micr . 
Journ ., and the following record of independent observation, 
and personal inquiry, may interest the readers of this maga- 
zine, and possess corroborative value when taken in con- 
nection with the more important investigations of other 
naturalists. 
Nineteen specimens were supplied to me, viz.: 
6 of healthy fresh pork from various parts of different 
pigs ; 
6 of fresh muscle, c ‘ slightly measled ;” 
6 of fresh muscle, “ badly measled ;” 
1 of cured pork, “ badly measled.” 
The “ measles” are occasioned by the presence of a para- 
sitic worm, known to physiologists and anatomists as the 
Cysticercus cellulose” 
This worm, as it occurred in the muscle or flesh of the 
pork supplied to me, consists of an external bag or cyst of 
delicate rugose membrane, enclosing the animal of the Cysti- 
cercus, retracted within its folds ; the space not occupied by 
the worm being filled with a clear watery fluid. 
PI. II, fig. 1, represents the natural size of the “ measles” 
in fresh muscle ; fig. 2 the same in stale or salted pork ; and 
fig. 3 the same from fresh muscle, magnified 6 diameters. 
The animal of the Cysticercus , when withdrawn from the 
cyst, within which it lies invaginated, and curled up, in all 
the specimens, consisted of a slightly enlarged head, 
fig. 4 a , and a neck formed of numerous rings, fig. 4 b , 
gradually enlarged into a bladder-like vesicle, fig. 4 c , which 
constitutes the body of the worm. 
The neck and body of the Cysticercus are filled with a 
mass of minute transparent bodies, which a further examina- 
tion leads me to regard as cellules discharging the function 
of assimilation, i. e ., converting the material endosmotically 
absorbed by the cyst and bladder-like vesicle into the sub- 
stance of the Cysticercus . The form of these cellules is 
usually that of a flattened circular disc, and their average 
diameter TXO oth of an inch, but neither their size nor form 
is constant, some being linear, others irregular in outline, 
and many not exceeding ^^th °f an i nc h * n diameter.* 
The head of the Cysticercus is provided, at its extremity 
with a circlet of about 24 hooklets (fig. 5 «), immediately 
* [These elliptical bodies are composed in most part of carbonate of lime, 
and would appear to be intended more for the purpose of giving greater 
firmness or solidity to the part of the entozoon in which they occur than for 
any other function. — Editors of Microscopical Journal .] 
