8 W. BLAXLAND BENHAM. 
similar to the “soapy foams” manufactured by Butschli’s 
method; the “alveolar layer” is formed by regular arrange- 
ment of the corpuscles along the margin of the mass, and the 
slow movement recalls that described by him. 
B. The blood when freshly drawn by rupture of the “ intro- 
vert ” in sea water (after removal of as much of the sea water 
as possible from the slide), and at once covered, presented the 
following appearance. Instead of a mass of similar small glo- 
bules, these were seen to be of various sizes,—most of them 
much larger than the corpuscles seen within the vessels, being 
as much as 0:04 mm. in diameter (fig. 15). 
From later experiments, carried out with greater care so 
that no water should be present, I am led to believe that the 
result here obtained was due to the presence of a certain 
amount of sea water on the slide; this causes the globules to 
fuse with one another, hence the varied sizes of the globules. 
3. Appearances presented by the Blood on the 
Addition of Various Reagents. 
1. Normal salt solution, passed under the cover-slip of 
such a preparation as described above (A.), causes the globules 
to separate from the masses if there has been no great amount 
of pressure. If the latter has occurred, only the corpuscles 
lying at the edge of the mass separate. At first the colour is 
unchanged, but soon it disappears. 
This disappearance of the colour was much more evident 
when the tubes used for spectroscopic analysis containing a 
little salt solution, the worms cut as above described, and 
the blood allowed to flow into the salt solution. I hoped to 
get a pink solution, but the colour very soon changed and 
became colourless. This may be due to deoxidation rather 
than to any destructive power of the salt; but whatever the 
cause, the result was a disappearance of colour. 
2. Distilled Water.—When water is added to blood 
already treated with salt solution, the following extraordinary 
series of phenomena ensues:—As the water displaces the 
salt solution the outlines of the globules disappear: this 
