DEEP-SEA FISHES 



397 



uable as lures, as labels, and as aids to courtship. And they kept their 

 eyes, with which to see the other fellow's lights. 



As other species followed into the depths, they too kept their eyes, for 

 they were never entirely lacking in things to see; and in due course many 

 of the new-comers developed photophores of their own, if they did not 



Fig. 134 — Fishes with light-produdng organs associated with the eyes. 



a, Photoblepharon palpebratus, a littoral species from the Banda Sea, showing photophore 

 (stippled). Based on photograph and drawing from Harvey, b, head of Photoblepharon 

 sp., profile and section, showing photophore and the opaque 'lid' which can be drawn up 

 over it. x3. Redrawn from Hein. c, head of the pelagic Anomalops katoptron, profile 

 and section, showing photophore and the recess into which, after being inverted, it can be 

 withdrawn, x 3. Redrawn from Hein. 



abready have them. But many fishes did let their eyes go to pot. The 

 deep-sea benthos, particularly, contains many species whose eyes are 

 covered with opaque skin or are vestigial — e.g., Barathronus, Typhlonus, 

 Aphyonus, and Tauredophidium among the teleosts, Tyhlonarke, Ben- 

 thobatis and Bengalicbthys among the rays. The bottom boasts the only 



