CYSTICEBCTIS CELLULOSE, AS TOUND IN THE MUSCLES OF THE PIG, 121 
leave no doubt of their general accuracy, also to such explanations of their meaning as 
appear to be almost self-evident ; and here I might have concluded this paper had there 
not remained some considerations entirely of a theoretical nature too important to be 
omitted. 
It will be asked, how the Oysticercus, in its earliest condition, such as I have described 
it, finds access to the interior of a primary fasciculus. Before attempting to answer this 
question, I must observe that my description commences from a condition of this ento- 
zoon so complete, that no one, on examining it with the microscope, and comparing it 
with those forms in which the development is more advanced, would doubt their identity. 
But this form, though so low, is very far from being the earliest indication of an 
abnormal state of the muscular fibres in all those animals which are infested with imma- 
ture Cysticerci. These conditions of the muscular fibres can at once be seen to be abnormal, 
but still they are altogether of an ambiguous character, and therefore I have deferred 
till now the consideration of them only from a wish to keep that which is certain and 
distinct from that which is only probable. 
Besides the cells and molecules already described as accumulated in sufficient quantity 
to present the undoubted form of a Oysticercus (see Plate X. fig. 11), numerous minute 
irregularly-shapen particles are also found in the same specimens of diseased muscle. 
These occur either singly or grouped together in clusters of different shapes and sizes. 
Some lie immediately beneath the sarcolemma, others are deeply seated in the substance 
of the primary fasciculi. See Plate XI. figs. 3 and 4. 
They exist both in fasciculi containing imperfect entozoa, and in those of the same 
specimen in which entozoa are not yet formed. 
These particles do not resemble in the least the scattered nuclei normally existing in 
muscular fibres, nor are they like the spherules of oil into which muscular fibres are some- 
times converted. Occasionally, however, there is a state of fatty degeneration of the 
muscular fibres, coexisting with this disease, which is known by the regularly spherical 
form of the pa.rticles of oil, and then- general arrangement in lines ; also by their more 
equal refraction of light. The particles peculiar to the cystic disease very often occur 
where there is no fatty degeneration whatever ; in no instance do they look like the 
globules of oil seen in fatty muscle and formed at the expense of the sarcous matter, but 
they exist independently of oil-globules, and appear to be lodged between the smallest 
fibrillse, tending to separate them longitudinally. 
Now, as these particles always exist in conjunction with the earliest forms of Oysticerei^ 
and in such cases only, and as it is almost impossible that such a collection of corpuscles 
and molecules as the one I have described to be the earliest unmistakeable form of this 
entozoon could have at once come into existence in so characteristic a form as that deli- 
neated in Plate X. fig. 11, I believe that these particles are antecedent ambiguous forms 
of Cysticerci^ and that this is the first stage of the disease as it exists in muscle. And it 
is further worthy of remark, that in some specimens of muscle very much infested with 
Cysticerci^ I have found some of the capillaries and small blood-vessels containing mole- 
