Colouring-matters of the so-called .Bile of Invertebrates, Sfc. 403 



which occurs in the coloured membrane lining the shell, and probably 

 identical with Moseley's " actiniochrome," also traces of enterochlorophyll, 

 &c. (From three different depths.) 

 Sp. 12. Bile of Pagurus bernliardus. 

 „ 13. Bile of Astacus jluviatilis, showing presence of reduced hsematin (sulphide 

 of ammonium haying been added) . This spectrum is a combination of the 

 results of examining a deep and shallow layer of " bile." 

 14. Alcohol extract of coeca of Uraster, showing presence of enterochloro- 

 phyll. 



„ 15. The same with nitric acid. Cf. 5, 3, 1, &c. 



„ 16. Spectrum of iirine containing urohsematin (without any treatment what- 

 ever). This is due to the presence of neutral urohsernatin. 



„ 17. Spectrum of urine containing uroheematin treated with a couple of drops of 

 nitric acid ; this is due to presence of acid iirohaematin. 



„ 18. Appearance of a chloroform solution of indigo blue and, perhaps, omicholin 

 got by boiling urine with hydrochloric acid, cooling, and shaking with 

 chloroform. The band at F is due to febrile urobilin. 



,, 19. Alcohol extract of uroerythrin from pink urates (got by boiling with 

 alcohol, &c). 



„ 20. Urine containing a peculiar red colouring-matter mentioned in the paper. 



This spectrum was got by treating it with nitric acid. 

 „ 21. The same urine with hydrochloric acid. This spectrum is a combination of 



three, as the feeble band near D is not seen in a depth which shows the 



other two. 



