46 



THE NATURE OF ANIMAL LIGHT 



0.39m 



Fig. 9. — Spectra of various luminous animals (.after 

 MeDermoU). 1. Portion of the visible solar (grating) spec- 

 trum showing Fraunhofer lines. 2. Pyropharus noctilucus 

 (Langley and Very.) 3. Lammria noctiluca (Conroy). 4. 

 Photinut pyralU (Ives and Coblentz). 5. Photinus con- 

 aanguineuB (Coblentz). 6. Photuris venneylvanica (Co- 

 blentz). 7. Phengodes laticollis (McDermott). 8. Bac- 

 terium phoaphoreum, B, phoaphoreacena or Bacillua photo- 

 genua (Molish). 9. Photohacterium indieum (Barnard). 

 10. Mycelium X (Molish). 11. Luminoua bacteria (Forster). 

 12. Agaricua ap.T (Ludwig). 13. Fluorescent spectrum of 

 luciferesceine of Photinua pyralia (Coblentz). Only the 

 extreme ends of the bands are shown and no attempt is 

 made to indicate the relative density of different portions 

 of the spectra. 



