252 



On Myohcematin and the Histolicvmatins. [Nov. 26, 



To give an idea of the connexion which exists between the histo- 

 haematins and myohsematin, I have here added a few wave-length 

 measurements. These are given in greater derail in the complete 

 paper, and the spectra have been mapped to the number of 70 in the 

 accompanying charts. 



No. 1. A histoheematin spectrum from the ovaries of a star-fish 

 (Uraster rubens) : — 



1st Band X613 — 593 



2nd „ X569— 560 



3rd „ X556— 548'5 



No. 2. A histohgematin spectrum from the stomach-wall of a 

 cat : — 



1st Band X613— 593 



2nd „ X569— 563 



3rd „ X556— 551 



No. 3. A similar spectrum from the pancreas of a cat : — 



1st Band X613— 596 "5 



2nd „ X569— 563 



3rd „ X556— 548-5 



No. 4. A myohsematin spectrum from Hydrophilus : — 



1st Band X613— 593 



2nd „ X560— 563 



3rd „ X557— 548-5 



No. 5. A myobsematin spectrum from the heart of the lobster 

 (Homarus vulgaris) : — 



1st Band X613— 593 



2nd „ X569-563 



3rd „ X556— 550 



No. 6. A myohaematin spectrum from the heart of a cat : — 



1st Band X613— 596-5 



2nd „ X569— 563 



3rd „ X556— 550 



It may be added tbat it is very difficult to measure these bands, 

 and allowing for this fact the agreement is very close, especially 

 as all the measurements were made independently of each other. It 

 is also necessary to add that the above are what may be called typical 

 histohsematin spectra, as in some cases Bands 2 and 3 are joined to 

 each other to form one band. 



