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

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                                of the animalcule. These corpuscles when 
completely formed have a bright oily look=
ing aspect & a diameter of about 1/8000 
of an inch. See Plate 1. fig: 8.
These corpuscles have the appearance 
of being formed by the coalescence of 
molecules which had existed in the 
clear space before any corpuscles were ap=
parent, by which they are afterwards re=
placed. After a growing end has become 
thus filled with these globular bodies the 
terminal membrane becomes more & 
more distinct, & the cilia-like fibres are 
afterwards added which are generally nei=
ther so regularly disposed, nor so distinct as 
on other parts of an entozoon. Next these 
corpuscles lose their spherical form & become 
flattened, & lastly they assume their cha=
racteristic elliptical or reniform figure 
before mentioned (See Plate 1. Fig: 10) 
which they retain as long as the ento=
zoon remains in its primary muscular 
fasciculus. This shape however is not 
essential to these corpuscles but merely 
results from the rounded form of the 
masses into which they are grouped 
together, each corpuscle by its convexity 
forming a segment of the circular 
outline of its respective mass. These 
corpuscles contain very fine dark granules 
so variously disposed in different ones, as 
to present a variety of appearances, such 
as circular or oval spaces which might 
be taken for nuclei or nucleoli. These 
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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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