466 THE DEPTHS OF THE SHA. [CHAP. 1X. 
a Fusus from 1,207 fathoms was similarly provided. 
The presence of organs of sight at these great depths 
leaves little room to doubt that hght must reach even 
these abysses from some source. From many con- 
siderations it can scarcely be 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 larve 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 KALSO, FROM THE HAMLET OF VIDERO. 
