THE BROOKLYN MUSEUM 



wall of this room is an exhibit illustrating the variation in 

 nature which may be brought about by different conditions. 



Variation with Sex or Season is shown by a group of 

 ruffs, and a fine series of great horned owls, representing a 

 wide area, illustrates well the varieties that may occur in 

 one species with varied geographic range. 



Variation Under Domestication is illustrated by an ex- 

 hibit on the east wall, showing the domesticated fowl as 

 evolved from the jungle fowl of India, and on the same side 

 of the room the various means by which different animals 

 have been able to survive in the struggle for existence, e.g., 

 by endurance, numbers, armor, concealment and warning or 

 protective coloration, are indicated. 



Albinism, Melanism and other color phases of animals 

 are shown in the passage to the east of this room; and, 

 opposite these, Adaptation to Environment is well illus- 

 trated by the snowy arctic owl, desert and cave animals and, 

 around the corner in the next hall, by color changes in the 

 demon stinger fish. 



The Hall of Vertebrates (Room 4 on plan), leading out 

 of Room 5 toward the west, contains exhibits of all the 

 important groups of backboned animals from fish to man, 

 arranged so that, by passing up the left or south side of the 

 room and down the right or north side, the animals are 

 considered in evolutionary sequence; also each group or 

 series is arranged so that the lower or simpler forms ap- 

 pear at the left, and therefore the exhibits should be studied 

 from left to right. 



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