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

                                inwards. See Plate 4. fig: 2. On two 
sides of this hollow there are dark transverse 
lines rather more distinct on one side 
than on the other, indicating the com=
mencement of the transverse rugae of the 
neck, mentioned in the description of this 
part in the perfect animal, in which the 
laminated earthy bodies are contained. 
About the central part of this projection 
there is an ill-defined oval space having 
a granular appearance, & containing 
some minute spherical particles of a 
dark colour, consisting apparently of a 
highly refractive material. See Plate 4, 
fig: 3. In this condition of the entozoon 
there is nothing in this space which has 
the slightest resemblance to the parts 
which are there about to be developed, 
namely, the hooklets, suckers, & earthy 
concretions; & it is only by the comparison 
of these obscure appearances with other specimens in which the 
development of the hooklets is a little 
more advanced, that their true significa=
tion is to be learned - See Plate 4, 
fig: 4 & 5.
Of these parts I will first describe 
the development of the hooklets, there 
being the most remarkable & charac=
teristic organs of a Cysticercus. 
By comparing the preceding specimens 
with one in which some of the hooklets 
are in progress of development, & suf=
ficiently advanced in their formation 
to