CONTRIBUTIONS TO ANIMAL CHROMATOLOGY. 79 
and was soluble in glycerine and water, and others soluble in 
alcohol, chloroform, bisulphide of carbon, &c. If I am correct 
in supposing that chlorofucin is present in Lepralia, it is due 
either to “ yellow cells,” which, so far as I am aware, have not 
been described in this species, or to a food product. There is, 
at all events, a close resemblance between sp. 15 and that of 
an alcohol solution of Laminaria digitata, in which chloro- 
fucin is present. ; 
In Flustra foliacea, as I have shown,! a chlorophylloid 
pigment can be extracted by alcohol, and this comes from the 
“brown bodies” in the empty zodecia. Professor Moseley 
kindly wrote to me on this subject. He says: ‘“‘ They [brown 
bodies] are due to the atrophy of the zooids. The digestive 
organs, lophophore, and viscera generally, of a zooid, may be 
gradually decomposed into cell masses of a brown colour without 
the structure of the cell or capsule of the zooid being affected. 
The funicular plates and their offsets remain and form a net- 
work round these brown bodies, and the large retractor muscles 
also persist. The brown bodies have often been mistaken for 
ova; they contain remains of food diatoms, and hence probably 
the source of the chlorophyll. . . . Accounts differ whether 
the new zooids take the brown bodies into their substance 
or digestive tract or no, probably not.” 
I could detect neither starch nor cellulose in these ‘‘ brown 
bodies,”’ and the chlorophyll which they yield to solvents gives 
a spectrum somewhat resembling that of “ modified” chloro- 
phyll, to which I referred above. The alcohol solution was a 
golden-yellow colour, and had a red fluorescence. Its dominant 
dark band read from \681'5 to \ 656, its darker part from 
\ 678 to X 662. It showed another before pv; the third 
chlorophyll band was missing, and there was one lipochrome 
band. 
ASCIDIANS. 
I have not yet had an opportunity of examining many 
Ascidians, but the few results which I have obtained may be 
useful for purposes of comparison. 
1 €Proc. Physiol. Soc.,’ No. iii, 1887, March 12th. 
VOL, XXX——PART 2, NEW SER. F 
