CYSTICEBCTJS CELLULOSjE, AS FOUND IN THE MUSCLES OF THE PIO. 127 
Fig. 2. A Cysticercus which has left the interior of a muscular fibre, and become situated 
in a cellular space between the muscular fibres, among the fat-vesicles always 
occurring in greater or less abundance in such situations. The crenate border 
and obscurely annulose appearance are here shown. 
Fig. 3. A portion of a primary muscular fasciculus, in which irregular particles, of dif- 
ferent shapes and sizes, are mixed with the muscular fibrillae. 
Fig. 4. Another portion of a primary fasciculus, in which the same kind of particles as 
those shown in fig. 3 are grouped together. 
Fig. 5. A blood-vessel -g-l^rd of an inch in diameter filled with organic molecules, taken 
from the heart of a pig very much infested with Oysticerci. 
Fig. 6. A portion of the same blood-vessel, magnified 400 diameters, showing the micro- 
scopic appearance of its molecular contents. 
Fig. 7. A Cysticercus removed from its adventitious cyst, whose length is yth of an inch, 
and breadth -g^th. This is the highest stage of the vermicular form, and it 
combines the characters of that represented in fig. 2 and that in fig. 1 of this 
Plate, also those of the next figure. 
Fig. 8. Shows that stage of the development of the Cysticercus in which is seen the 
earliest indication of the future neck with its booklets and suckers. The 
whole of the animalcule is here shown as magnified 15 diameters, {a) the 
part to be occupied by the neck, where traces of its plicated form, also suckers 
and booklets, are beginning to appear. 
Fig. 9. Shows the part marked (a) in the preceding figure, magnified 100 diameters, 
these parts being faintly indicated. 
Fig. 10. Shows a stage in which the booklets are in progress of development; the neck 
is but little more advanced than in fig. 9. The entire entozoon is here shown 
as magnified 10 diameters. 
Fig. 11. The booklets of the preceding specimen, magnified 100 diameters. Six of them 
are sufficiently advanced to be recognizable : (a) particles of the material of 
which others are about to be formed, grouped together, but not~yet coalesced 
sufficiently to form any recognizable portion of a booklet. 
Fig. 12. A form a little more advanced, showing the entire entozoon, magnified 10 dia- 
meters. 
Fig. 13. The booklets of the same specimen, magnified 100 diameters, exhibiting the 
same appearances, indicative of coalescence, as in fig. 11; here there are, how- 
ever, portions of booklets sufficiently formed to be recognizable, mixed with 
particles of the same material not having yet received a recognizable figure. 
Fig. 14. Portions of booklets from different specimens, magnified 200 diameters. 
