4G6 



THE DEPTHS OF THE SEA. 



[CHAP. ix. 



a Fusus from 1,207 fathoms was similarly provided. 

 The presence of organs of sight at these great depths 

 leaves little room to douht that light must reach even 

 these abysses from some source. From many con- 

 siderations it can scarcely he sun-light. I have 

 already thrown out the suggestion that the whole 

 of the light beyond a certain depth might be due 

 to phosphorescence, which is certainly very general, 

 particularly among the larvae and young of deep- 

 sea animals ; but the question is one of extreme 

 interest and difficulty, and will require careful in- 

 vestigation. 



BORDO, KUNO, AND KALSU, FROM THE HAMLET OF VIDPRO. 



