On the Structure and Development of the Cysticercus cellulosae, as Found in the Pig, by George Rainey

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                                correspond in this situation to the barbs 
situated on each side of the extremity 
of an ordinary feather. See Plate 2. Fig: 2 & 3.
As the first position of these animals 
is in the very substance of a primary mus=
cular fasciculus, (See Plate 2 fig: 4) it 
is obvious that the mechanical action of 
this apparatus will be to aid their longitudinal 
development whilst new cells are in pro=
gress of formation in their interior. 
For it is scarcely possible that the 
muscular fibrillae by which they are 
surrounded can when in action, fail 
by their friction to urge the two extremities 
onwards in opposite directions, whilst 
at the same time, the fibres, by which these entozoa are covered are in conse=
quence of their direction preventing the 
separated ends from regaining their 
former position, & thus the two ends 
being always carried in opposite directions 
without the possibility of a counter 
movement a general elongation must 
ensue. This apparatus also, by splitting 
up the primary fasciculi, will serve a 
locomotive purpose, & thus enable these 
animals to reach the cellular intervals 
between the muscular fibres, where their 
further development will be completed. 
That such is the effect of the fibres
in question is evident on a careful 
inspection of some of the fasciculi in 
which these animalcules are contained, in 
which a separation of the fibrilla can 
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George Rainey
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On the Structure and Development of the Cysticercus cellulosae, as Found in the Pig, by George Rainey, 1857. From The Royal Society, PT/56/8



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