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56 ' DEEP-SEA FISHES 
pike, mullets, mackerel, basses, wrasses, drumfish, sculpins, cods, flat- 
fishes and anglers. 
The end case exhibits the grotesque fishes from deep water, in 
which they occur to the surprising depth of over 3,000 
Deep-Sea 
Fishes fathoms, or more than 3% miles. They are usually soft. 
in substance, with huge heads and dwarfish bodies, and 
are often provided with illuminating organs like little electric bulbs, 
which can be “‘shunted”’ off or on by the fish, and enable the fishes either 
to see their neighbors or to attract their prey. A group representing a 
number of these fishes as they are supposed to appear in the gloom of the 
profound depths, lit up only by their luminous organs, is shown in an 
enclosure next to the Paddlefish Group mentioned above. See page 56. 
Before the visitor has completed his view of the hall, he should 
examine the two wall cases, on either side of the doorway, which explain 
the characteristic structures of fishes of different groups, and the way 
in which the groups are related to one another. In one of these wall 
cases various kinds of fishes have been arranged in a genealogical tree, 
and the lines and labels give an idea of their evolution. 
Above the cases hangs a reproduction of the Giant Ray or “devil- 
fish” over sixteen feet across, taken by Mr. Coles, with whom Colonel 
Roosevelt made the expedition described in Scribner’s for October, 1917. 
[Return to the Elevators.| 

CHIMERA, A DEEP SEA “SILVER SHARK” 

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