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

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                                to leave no doubt of their real nature, it 
will be seen that the highly refractive globular 
particles seen in Plate 4. fig 3 are portions 
of the material of which the hooklets are composed. The entire number of these 
organs is not in progress at the same time, but only about six are being 
developed at once, which, when nearly 
completed, others make their appearance. 
The primary condition of one of these organs 
is very remarkable, consisting merely of 
a confused & irregular group of very bright 
particles of a pale straw-colour of various shapes 
but still all have a contour more or less 
curvilinear, & the smaller ones are of a 
spherical figure. Their size varies from 
about that of the third part of a handle of 
a perfect hooklet, to a particle so minute 
as scarcely to be appreciable by the highest 
powers of the microscope. There are all the 
intermediate sizes between these extremes. 
Notwithstanding however, these extremes of size 
& form, all these particles possess the same 
optical & physical properties so as to be per-
fectly recognisable both when apart & when 
joined together in the perfect hooklet. 
See Plate 4. fig 4 & 5, in which they undergo 
no appreciable change in their general ap-
pearance. 
At a period of the development a little 
more advanced <s>a little more advanced<\s> some 
parts of a hooklet can be recognised among 
these various forms, especially the curved portion 
as 
fol. 9 Sig 2
                            
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Manuscript details

Author
George Rainey
Reference
PT/56/8
Series
PT
Date
1857
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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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