AND ITS RELATION TO ANIMAL LIFE 23 



In the proceedings of the Royal Society, vol. 

 i.-xiii., 1898, page 389, is a paper on Chloro- 

 phyll, by C. A. Schunck, communicated by 

 Dr. E. Schunck, F.R.S. 



He says : " The very near relationship that 

 has been shown to exist by Schunck and 

 Marchlewski between phylloporphyrin (a 

 chlorophyll derivative) and haematoporphyrin 

 (a haemoglobin derivative), and the remark- 

 able resemblance of their absorption spectra 

 one may almost say they are identical. 

 But further on I will show that this particular 

 resemblance in these two derivatives is only 

 partly correct, the band in the phylloporphy- 

 rin I examined being double, though occupy- 

 ing the same position as the single one of the 

 haematoporphyrin." 



This statement is both interesting and im- 

 portant, but I desire to lay more stress upon 

 the resemblance observed by C. A. Schunck 

 than upon the difference in the spectra, be- 

 cause I believe such difference would be fully 

 accounted for if the phylloporphyrin were 

 obtained, say, from a rice plant containing 



