90 MR. T. WHARTON JONES ON THE BLOOD-CORPUSCLE CONSIDERED IN 
is also soon observed that its cell- wall bulges out here and there into round processes 
which again subside, whilst another part of the cell-wall bulges out in the same way. 
This change of shape, it will be perceived, is similar to that which 1 particularly 
described in the case of the granule-cell of the blood of the Skate, only it is to be 
remarked, that it is not accompanied by such u well-marked movement of the con- 
tained granules. Besides bulging out into round processes, the cell-wall may be 
seen to shoot out into ci lia-like processes also (fig. 4.). 
7. As regards the nucleated cell, it also first tends to become circular, and then 
shoots out its wall into processes which are usually more cilia-like than in the case 
of the granule-cell ; and being in all directions like radii, the cell comes to present a 
stellate appearance (figs. 7, 8, 9.). Sometimes a cell is seen to shoot out into pro- 
cesses in two principal directions only, these processes again shooting out into smaller, 
so that the cell acquires a caudate form. Between this shape and the former there 
is every intermediate degree. 
8. Size of the Cells. — When first examined, and before their shape has become 
changed, the granule-cells are about xsVo^ 1 °f an inch long by about of an 
inch broad. The nucleated cell is rather less in size, or perhaps with about the same 
length ; it is not quite so broad. 
9. Structure of the Granule-cell. — There are both coarsely and finely granular 
stages of the granule-cell. The granules appear more or less fused together, and 
are of a slightly greenish yellow colour when the microscopical examination is made 
by day-light. 
10. By the addition of water the cell-wall is brought out very distinctly. Imbi- 
bing the water, the cell becomes distended and acquires a circular shape, and this as 
well after it has shot out into processes as when the water is added to the blood just 
drawn, and before the cell has lost its original shape. Fig. 5 a. represents a granule- 
cell as acted on by water. 
11. In consequence of acetic acid producing a copious white curdy precipitate on 
its addition to the blood, some difficulty was at first experienced in studying the 
action of that acid on the blood-cells, but by previously diluting the blood with much 
water, the precipitate was not considerable enough to prevent the observation of the 
action of the acetic acid on the blood-cells. 
12. When the acid comes into contact with the granule-cell, the granulous mass 
is dissolved, the granules disappearing one after the other, as already described in 
regard to the granule-cell of the Skate, &c. After the solution of the granulous mass, 
there is discovered in the interior of the cell, a cellaeform nucleus about y^-gth of an 
inch in diameter (fig. 5 h.). 
13. A clear spot which may be observed on the side of the granule-cell in blood 
just drawn (figs. 1, 2, 3.), and which is similar to that presented by the granule-cell 
of the blood of the Skate, appears to be, as in the Skate, produced by the nucleus 
peering through a pore in the granulous mass. 
