82 MR. T. WHARTON JONES ON THE BLOOD-CORPUSCLE CONSIDERED IN 
106. The corpuscles were, — 1st. Granule-cells in both coarsely and finely granular 
stages, altogether similar to those of the blood (figs. 1, 2.). 2nd. Besides many cells 
in transition from granule to nucleated phase, nucleated cells in both uncoloured and 
coloured stages, quite the same as those of the blood (figs. 7 and 15 a.). The nu- 
cleated cells were fully distended independent of the addition of water, and were 
comparatively the most numerous of the corpuscles in the lymph ; those in the co- 
loured stage being more so than those in the uncoloured stage. Slight as the colora- 
tion of the coloured stage of the nucleated cell was generally, some few cells pre- 
sented it perhaps in a more marked manner than is usually presented by the same 
cells as they occur in the fully-formed blood ; in this respect approaching to the red 
nucleated cell of the blood of the early mammiferous embryo. Some even were 
of an oval shape. 3rd. A considerable number of free cellseform nuclei, both unco- 
loured and in different degrees of progressive coloration. These free cellseform nu- 
clei were not much affected by the action of acetic acid or water. Lastly, there were 
seen here and there among the other corpuscles the empty shell of a nucleated cell 
in the coloured stage, with a free cellseform nucleus beside it as if just extruded 
by the bursting of the cell-wall. This is a circumstance which may be viewed as 
additional evidence, and this of a direct kind, in support of the view above given 
of the nature and origin of the “ red corpuscle” of Man and the Mammifera. 
107. From the account now given of the corpuscle of the lymph of vertebrate ani- 
mals, it appears that it is identical with the corpuscle of their blood. In the oviparous 
Vertebrata, it occurs, like the corpuscle of their blood, in the two phases of granule 
and nucleated cell ; whilst in Man and the Mammifera it occurs, like the corpuscle 
of their blood, in the three phases of granule-cell, nucleated cell and free cellseform 
nucleus. 
108. The only difference that exists between the corpuscle in the lymph and the 
corpuscle in the blood, is, as regards the oviparous Vertebrata, the little degree of co- 
loration which the coloured stage of nucleated cell as yet presents, and as regards 
the Mammifera, the small degree of coloration which the coloured stage of free 
cellseform nucleus has as yet attained. 
109. The comparatively small total amount of corpuscles in the lymph is well-known. 
As regards the relative number in the different phases of the corpuscle, it is to be 
remarked that in the oviparous Vertebrata, the nucleated cells are, as in the blood, 
more numerous than the granule-cells. The nucleated cells are also more numerous 
than the granule-cells in the lymph of Man and the Mammifera, which is different 
from what obtains in their blood. Taking into account this relatively great number 
of nucleated cells, and the existence, though in less numbers, of free cellseform nuclei, 
we might compare the contents of the thoracic duct of a mammiferous animal, in re- 
spect both of the kinds of corpuscles and of their relative but not absolute numbers, 
with the blood of its early embryo state. The circumstances above-mentioned, that 
some of the nucleated cells of the contents of the thoracic duct present in the coloured 
