190 Cc. A. MACMUNN. 
On treatment with rectified spirit acidulated with sulphuric acid, only some yellow 
pigment went into solution; effervescence took place and it was evident that red pigment 
occurred in combination with lime. It was also evident that no haematoporphyrin was present}. 
On acting on the integument with hydrochloric acid and water a fine red solution was 
obtained which showed under the microspectroscope a broad band or shading in the green: 
extending from about 27566 to X495. In deep layers the violet end of the spectrum was 
strongly obscured. Caustic soda was then added drop by drop until the solution became 
alkaline, the precipitate—consisting of sodium chloride—was pale pink, and on filtering, the 
filtrate was almost colourless. Alkalies do not therefore destroy the red colour. This pigment 
was found to be insoluble in ether and in chloroform, 
1 See the papers by MacMunn in Journal of Physiology, vol. yu. No. 3, and vol. vit. No. 6. 
