98 MR. T. WHARTON JONES ON THE BLOOD-CORPUSCLE CONSIDERED IN 
78. By the action of water the contents of these corpuscles, previously homogene- 
ous looking, adherent to the cell-wall, and concealing the nucleus, became broken up 
into granules, so that the cell-wall and a nucleus came more or less distinctly into 
view, with characters similar to those presented by them after the animals had been 
kept some time as above mentioned, and which I now proceed to describe (fig. 8.). 
79. The cell was generally circular but sometimes oval, and its wall did not shoot 
out into processes. It measured on an average - ^Vo th of an inch, some more, some 
less. 
80. The nucleus was circular or oval. In the former case it measured about 
3 § V oth of an inch in diameter, in the latter, the mean of the two diameters was on 
an average the same as this. Some were much elongated but narrow, others short 
but broad. 
81. The circular cells had the nucleus either circular or oval, but when the cell 
was oval the nucleus was oval also, and usually elongated and narrow. Sometimes 
the oval nucleus appeared almost free, the cell-wall very much contracted, being 
attached to one side only. 
82. In addition to the corpuscles now described, there were observed corpuscles 
very pale and few in number, apparently the nuclei of the nucleated cells become 
free and in process of disappearing. 
83. Lastly, there was a great number of elementary granules ; the larger, of the 
form of biconcave circular discs, measuring on an average e oVo 'th or y oVo th of an 
inch in diameter, less or more. 
84. It thus results that in all the invertebrate animals in which the blood has now 
been examined, the blood-corpuscle presents itself in the phases of granule-cell and 
of nucleated cell ; that in the phase of granule-cell it occurs in more or less well- 
marked coarsely and finely granular stages ; that in the phase of nucleated cell it 
occurs in the uncoloured stage ; but that as regards a coloured stage, though such 
cannot be said to be altogether wanting in some of the animals, the coloration of the 
cell is in a very slight degree. The cellseforrn nucleus is found more frequently and 
more decidedly coloured. 
85. It also results that corpuscles exist in transition from the phase of granule- 
cell to that of nucleated cell. 
86. It farther results that corpuscles occur in the blood of some of the animals, 
which appear to be the nuclei of the nucleated cells become free. Such, however, 
are to be viewed as abortions rather than as examples of a third phase, or phase of 
free celleeform nucleus. 
87. Lastly, it results that corpuscles are met with in greater or less numbers 
belonging to the category of the lowest forms of organic elements, viz. elementary 
granules. 
