180 PHOSPHORESCENCE. 
Quatrefages, the light of glowworms is a pheno- 
menon of combustion—such, at least, was the 
opinion of these philosophers when their observa- 
tions were published. 
According to De Quatrefages and Professor 
Ehrenberg, the light of the Noctiluca is an electric 
phenomenon. Ehrenberg has discovered im a little 
marine worm, Photocharis cyrrigera, that which 
appears to him the organ of phosphorescence. He 
thinks also, that those small elevations which we 
observe upon the bodies of Noctiluca, when highly 
magnified, are so many phosphoric organs; so 
that it seems evident, at present, that wherever 
phosphorescence is observed in animals, there 
exists a special organ destined to fulfil this func- 
tion. 
