126 CELL INTELLIGENCE THE CAUSE OF EVOLUTION 



his nose enabling him to see in the dark. These things are 

 all necessary to an existence two miles down in the water. 

 This perfect arrangement of everything to meet condi- 

 tions, exhibited in this individual, must have also re- 

 quired ages of experimenting by the best intellects. The 

 Albatross Expedition describes him as follows : 



"Among the strangest of these ascending night feeders 

 are the lantern fish, remarkable for this, that their bodies 

 are dotted over with electric lights ; certain round phos- 

 phorescent spots arranged in rows along the sides, that 

 glow brilliantly just as fire flies glow, especially a large 

 spot on the end of their noses that shines like a search 

 light. So these queer fish move through the water, 

 ascending and descending small submarines all ablaze. 

 There may be a double usefulness in these phosphorescent 

 lights which flare up suddenly against a deep sea enemy 

 and frighten him away, or which lure the prey at higher 

 levels, as a candle lures the moth." 



It must be conceded that to be able to build and main- 

 tain a submarine like this we call the lantern fish, which 

 can light up its surroundings and adjust the structure to 

 'resist the pressure of the water at different depths up to 

 two miles, is a task requiring the best engineering and 

 keenest intellect. Think of the details to be looked after 

 to keep it adjusted to the ever changing environment, to 

 keep all the lights going, to gather the material and manu- 

 facture the light. 



Fig. 21, the Lure Fish, is another illustration of a fish 

 that tempts its prey by means of a phosphorescent light. 

 He has a bait that shines, attached td the other end of the 

 string which he lets out like a fishline to attract curious 

 individuals. The string to which his bait is attached is 

 such that he can let it out and pull it in at will. This you 



