268 Rinclerijest 
sliced off. Sometimes only a quarter or third of the whole periphei’y is 
thus straightened, but at other times the corpuscle is reduced to a plain 
half-moon shape. At the same time measurements show that nothing 
has been really lust, the bulk of the corpuscle as a whole is not reduced. 
This phenomenon of “ squared corpuscles ” is clearly due to a stretching 
of their margin by something which lies within. It seems impossible to 
refuse assent to the belief that this something is the specific body which 
the stained specimens depict, which by reason of growth, or change in 
rigidity, effects the distortion. The body when in this state, has in all 
my specimens proved refractory to stain (PI. XIX, figs. 81, 82, 84, 87). 
(II) Protrusions, and projecting filaments of variable size and form 
emerge from the corpuscle. These projections are of highly refractive 
appearance, imcoloured, or if of any tint, of that of the corpuscle itself. 
In fresh specimens they are always unstained, and in dried films take on 
equally whatever stain is absorbed by the haemoglobin. Their projection 
appears to make no difference to the remainder of the corpuscle, which 
retains perfectly its colour and contour. As with the stained bodies, 
these protuberances may become wholly free of the corpuscle, or remain 
but just attached to it by a single extremity; and many again are to be 
seen floating freely in the plasma, which do not seem to have been 
immediately derived from any erythrocyte (PI. XIX, figs. 72-77 and 
88-109). 
Movements. 
1. It is frequently seen that the corpuscles, during the first twenty- 
four hours or so of observation, and especially when in the condition which 
I have termed “ squared,” are iu active movement. Rapid oscillations 
of brief period are combined with rotatory changes of position. The 
effect is on an exaggerated scale the same as Brownian movement. But 
with much experience of the behaviour of corpuscles in various fluids 
I am unable to recall any condition in which the same effect is exhibited. 
The slow irregular translatory motion of erythrocytes under the influence 
of contained active piroplasms (as described by Smith and Kilborne in 
their original monograph) is by no means the same thing. The jostling 
of tlie corpuscles in the state now described is very lively, and results 
in a considerable extent of change of place, or translation among them. 
2. Within the corpuscles, the specific forms, even when in a fairly 
advanced condition of staining, and after several days of observation, 
exhibit definite movements of their own: 
(a) They bend and unbend, sometimes pretty rapidly. 
(5) They twist or rotate sluggishly, about their long axis. 
