(Se CG. A. MAO MUNN. 
matter itself absorbs the violet and gives an ill-defined shading 
in the green. When extracted with water a faint reddish- 
yellow solution was obtained, showing some shading at the blue 
end of green, but no bands came into view with ammonium 
sulphide. 
A glycerin extract was faintly yellow and showed no bands, 
with or without ammonium sulphide. 
The alcohol solution was a deep yellow colour, and showed 
a faint red fluorescence; it gave a chlorophyll-like spectrum 
(sp. 12), and in a shallow layer a single lipochrome band 
became detached (sp. 13). The residue left by evaporation of 
this solution was in places yellow, in others brownish-yellow 
while some red parts were also visible in it. It became blue 
and green with nitric acid, and dirty blue-green with sulphuric 
acid. 
The ether solution was a clear green-yellow colour, and gave 
sp. 14; it hada red fluorescence. Ina thin layer asingle badly- 
marked lipochrome band was seen. On evaporation a yellow- 
brown residue was left, which, when dissolved in alcohol, gave 
sp. 15; this differs from that of the first alcohol extract. The 
new band in the red would indicate probably the presence of 
chlorofucin. Ina thinner layer the single lipochrome band read 
from about A 512 to (468. The yellow-green residue from this 
solution became green and blue with nitric acid, a dirty brown- 
green and green with sulphuric acid, and was, perhaps, slightly 
redder with iodine in iodide of potassium. 
The acetic acid extract of Lepralia was brown-yellow in 
deep layers, dull yellow in thin ones, and absorbed in the former 
the violet end of the spectrum strongly, and in the latter 
showed a band at the blue end of green. 
I find that Krukenberg (in Tafel ii, 11, of ‘ Vergleichend- 
physiologische Studien,’ zweite Reihe, dritte Abth., 1882) has 
figured the spectrum of a red “ Kalkbryozoe,” which he sup- 
posed to be Lepralia. He attributes the presence of a band 
in red to a “ Hepatochromate” (=enterochlorophyll). He 
found a similar pigment in Bugula neritina, besides another 
—“Bugulapurpur’”—which belonged to the “ floridines,” 
