60 Adaptations of Fishes 
entiated areas round or oblong which shine star-like in the 
dark. These are usually symmetrically placed on the sides of 
Fig. 44.—Headlight Fish, .#ihoprora lucida 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 
Fic. 45.—Corynolophus reinhardti (Liitken), showing luminous bulb (modified 
after Liitken). Family Ceratiide. Deep sea off Greenland. 
genus, thoprora, the luminous snout is compared to the head- 
light of an engine. 
