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V. Tue COLOURS OF ANIMALS AND SEXCAL SELECTION.

General Phenomena of Colour - Theory of Ileat and Light as producing

Colour-Changes of Colour in Animals produced by Coloured Light-

('lassification of Organic Colours--Protective Colours-- Warning Colours

- Sexual Colours--Typical ('olours - The Nature of Colour-How Inimal
Colours are Produced-l'olour a Normal Product of Organization - Theory
of Protective Colours- Theory of Warning Colours - Imitative Warning
Colours, The Theory of Jimiery- Theory of Sexual Colours-Colour
as a Means of Recognition-Colour proportionate to Integumentary
Development --Sulection by Females not a Ciuuse of Colour— Probable Use
of the llorns of Bretles-Cause of the greater Brilliancy of some Female
Insects--Origin of the Ornamental Plumage of Vale Birds---Theory of
the Displity of Ornaments by Males-Natural Selection as neutralizing
Sexual Selection-Greater Brilliance of some Female Birds—Colour-
development as illustrated by IIumming-Dirds--Theory of Typical Colours
-Local Causes of Colour-levelopment-Summary on ('olour-development
in Animals--('oncluding Remarks on Causes of Bright Colour in the
Tropies.

pigis 153-2:20

TROPICAL NATURE,

AND OTHER ESSAYS.

NH3608.78

s 7900.92.14

HARVARD
UNIVERSITY
LIBRARY
NO7 22 1954

LONDON:
R. CLAY, SONS, AND TAYLOR,

LREAD STREET HIL.

THE TROPICS.

Land of the Sun ! where joyous green-robed Spring
And leaf-crowned Summer deck the Earth for ever;
No Winter stern their sweet embrace to sever
And numb to silence every living thing,
But bird and insect ever on the wing,
Flitting 'inid forest glades and tangled bowers,
While the life-giving orl's effulgent beams
Through all the circling year call forth the flowers.
Here graceful palms, here luscious fruits have birth;
The fragrant coffee, life-sustaining rice,
Sweet canes, and wondrous gums, and odorous spice ;
While Flora's choicest treasures crowd the teening earth.
Beside each cot the golden Orange stands,
And broad-leaved Plantain, pride of Tropic lands.

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