Schunck . — The Chemistry of Chlorophyll. 1 1 5 
treating ordinary chlorophyll-solutions with acids, since the 
substance is to a great extent removed by agitating the 
solution — in accordance with the suggestion of Professor 
Stokes — with carbon disulphide, being afterwards found in 
the lower yellow liquid. R. Sachsse 1 claims to have first 
discovered and prepared the glucoside accompanying chloro- 
phyll, to which this reaction is due. 
Chlorophyll in Animals. 
The question as to the existence of chlorophyll in animals 
has been much debated. It would indeed seem a priori im- 
probable, considering what the functions of chlorophyll are, 
or are supposed to be, that it should be found in the organs 
of any true animal. In some cases, as in that of Bonellia 
viridis , the colour is not due to chlorophyll, as had at one 
time been supposed, but to a substance of similar properties, 
to which the name Conellein has been given. In other cases 
the formation of chlorophyll is due to parasitic algae existing 
within the animal organism, and is therefore not the direct 
product of the latter. There are some cases, however, where 
it is present in and formed by the animal itself, as shown 
by Professor Ray Lankester, who found that the green colour 
of Spongilla fluviatilis and Hydra viridis was due to chloro- 
phyll present in the cells, and not to parasitic algae. Dr. 
MacMunn has found a chlorophyll in the digestive glands (so 
called ‘ livers ’) of various invertebrate animals 2 , which gives 
a spectrum and reactions similar to those of plant-chlorophyll, 
the term chlorophyll being here used in the wider sense. This 
pigment he named entero-chlorophyll. He also found a chloro- 
phyll in several sea-water sponges 3 , and verified the statement 
of Pocklington — called in question by Krukenberg and Chau- 
tard — that chlorophyll is present in the elytra of cantharides 
beetles 4 . With regard to the function of animal chlorophyll, 
Dr. MacMunn suggests that it is probably respiratory. 
1 Chem. Centralbl, Feb. 1884. 2 Proceedings of Roy. Soc. XXXV. 370. 
3 Journ. Physiol. IX. 1. 4 Brit. Assoc. Rep. 1883. 
