i88 



Adaptations of Fishes 



entiated areas round or oblong which shine star-hke in the 

 dark. These are usually symmetrieally placed on the sides of 



""^-^^^^s^ 



Fig. 142.— Headlight Fish ^iSlinprora lucid i Goode and Bean. Gulf Stream. 



the body. They may have also luminous glands or diffuse areas 

 which are luminous, but which do not show the specialized 

 structure of the phosphorescent spots. These glands of similar 

 nature to the spots are mostly on the head or tail. In one 



Fig. 143. — Coriinohjilnit; rcinhnrdii (Liitkon), showing luminous I:)ull5 (modified 

 after Tjiitkcn). Family Ccratiidir. Deep .sea off Greenland. 



genus, .Ethoprora, the luminous snout is compared to the hcad- 

 litjht f>f an engine. 



