590 C. A. MAO MUNN. 



Sp. 9. — Action of hydrochloric acid ou the same solution, showing changed 

 chlorofucin as Sorby describes it. 



Sp. 10. — Second absolute alcohol extract of the tentacles; this shows mainly 

 the chlorophyll bands, possibly the narrow band belongs to the chlorofucin ? 



Sp 11. — This was diluted with water and agitated with bisulphide of carbon 

 which on separating gave this spectrum. 



Sp. 12. — The same shallow depth. 



Sp. 13. — Third absolute alcohol extract of tentacles (the second and third 

 extract of the parts without the tentacles gave the same bauds as the second 

 and third extract of the tentacles, therefore they have not been mapped). 

 Note in 13, the narrow (second) band is gone, showing that now the chloro- 

 phyll constituent is probably alone present. 



Sp. 14. — Action of caustic soda on the last solution. 



Sp. 15. — For comparison with the chlorophyll bauds of Anthea. An 

 absolute alcohol extract of a green Ulva, was diluted with water and agitated 

 with carbon bisulphide, which after separation gave this spectrum; this 

 solution appears to contain Sorby's "yellow chlorophyll." Compare with 5, 

 11, and 13. 



Sp. 16. — Thin layer of the same. Compare with 12, and it will be seen 

 that probably a similar lipochrome is present in Anthea and in Ulva. 



