588 C. A. MAO MUNN. 



chlorofucia and yellow chlorophyll mixed ; the third spectrum 

 also evidently represents the bauds of both pigments, and the 

 fourth shows a chlorofucin spectrum. In his second paper, which 

 deals with Anthea viridis var. plumosa, the plate (Tafel iv)^ 

 shows clearly enough the presence of the same colouring mat- 

 ters, thus in sp. 2 the bands of chlorofucin are visible; in 

 sp. 3 the chlorophyll constituent is present, perhaps mixed 

 •with the former, and so in all the others the presence of the 

 same pigment with the lipochrome or lipochromes can be 

 detected. Hence there is no essential difference between the 

 pigments of Anthea plumosa and Anthea cereus, and 

 doubtless, in the former, they are all due to the '^ yellow cells " 

 also. Krukenberg seems to lean to the opinion that these 

 colouring matters are allied to what he calls "hepatochromates/"' 

 but such atheory is easily controverted, because (1) eaterochlo- 

 phyll is not nearly so easily decomposed as are the pigments of 

 Anthea, and (2j the "fractional" method distinguishes them at 

 once : in the case of enterochlorophyll, the bisulphide takes up 

 more of the lipochrome, the alcohol retaining some chlorophyll. 

 There are other reasons- which I have given elsewhere, and 

 the morphological differences are so well marked that it is no 

 longer possible to maintain such a view. 



The present paper contains only a preliminary account of 

 the subject, which I hope to study more thoroughly again. 



I have gone over most of Sorby's experiments during the 

 last ten years, and I am more and more convinced of the 

 soundness of his deductions and the accuracy of his experi- 

 ments; but owing to his diagrams not giving all the bands, and 

 his bands not having all been described in wave-lengths, one 

 has great difficulty sometimes in following the descriptions. 

 This remark more especially applies to the chlorophylls, as I am 

 unable yet to distinguish " blue '^ from '' yellow chlorophyll," 

 and I think one is safe in concluding with recent observers that 

 the green constituent of chlorophyll gives four bands in the red 

 half of the spectrum, and the yellow those in the violet half ; 

 1 Ibid., 2te Reihe, 3tte Abtli., 1882. 

 ^ E. g., the spectra are totally different. 



