478 
C. A. MAC MUNN. 
specimens examined by me gave no bands, and did not con- 
tain therefore the same pigment which I found in those of 
Serpula to be referred to further on. 
The green fluid had a reddish tinge with reflected gaslight, 
and in most cases was green with transmitted daylight, and 
reddish with transmitted gaslight. On dilution with water the 
fluid gave two bands : — the first from X 618 to X 593, the second 
from X 576 to X 554’5. On then adding ammonium sulphide 
I obtained sp. 2, Chart I. As well as I could make out the 
first of these bands extended from X 625 to X 596’5 (?), but 
this and also the second band were very faint. If now caustic 
soda were added to this solution a dark band was seen covering 
D, which recalls to mind the band of alkaline hsematin (sp. 3, 
Chart I), and this band extended from X 595 to X 576. 
If an aqueous solution is treated with caustic soda alone this 
appearance is not seen, as the bands become faint and gradually 
disappear, but if then ammonium sulphide is added, the same 
band covering D appears (sp. 3, Chart I). 
If the blood is treated with rectified spirit and caustic 
potash and filtered a yellowish solution is obtained free from 
bands, but on adding ammonium sulphide a band appears 
covering D, as in the case of the aqueous solution (sp. 4, 
Chart I). 
In some specimens the second band did not occupy the same 
position as before in aqueous solutions of the blood ; it some- 
times read from X 569 to X 551, and with ammonium sulphide 
the band of this reduced chlorocruorin extended from X 623 to 
X 593 (see sp. 5 and 6). But on adding caustic soda to this 
reduced fluid the band, like that of sp. 3, again appeared. 
On treating aqueous solutions with acetic acid the bands 
faded away, and the colour of the solution changed to brownish 
(gaslight). 
I tried the action of rectified spirit acidulated with sulphuric 
acid on chlorocruorin, and obtained a faint greenish solution, 
which showed a faint shading in the green too indistinct to 
map. 
On treatment with sulphuric acid a brownish-yellow solution 
