o come.

"Then comes the statelier Eden back to men;
Then ring the world's great bridals, chaste and calm;
Then springs the crowning race of human-kind.
May these things be."

BIBLIOGRAPHY

N.B.--This bibliography is intended as a guide to the student; it is
merely representative, not in any way exhaustive.

The books to which direct reference is made are marked with an
asterisk.

BIOLOGICAL PART

*AUDUBON: Scenes de la nature dans les Etats Unis (_French trans._).
Ornithological Biography: an Account of the Habits of the Birds of
the United States of America.

BATESON, W.: Materials for the Study of Variation.
Mendel's Principles of Heredity.

*BONHOTE, J. LEWIS: Birds of Britain.

BREHM: Tierleben.
Ornithology, or the Science of Birds. (_From the text of Brehm._)

BROOKS, W.K.: The Law of Heredity.
The Foundations of Zoology.

*BUeCHNER: Mind in Animals (_Eng. trans._).
Liebe und Liebesleben in der Tierwelt.

*BUTLER, SAMUEL: Life and Habit.
Evolution Old and New.

*DARWIN, CHARLES: The Descent of Man.
The Origin of Species.
The Variation of Animals and Plants under Domestication.
The Expression of the Emotions in Men and Animals.

*DARWIN, FRANCIS: Life and Letters of Charles Darwin.

*ELLIS, HAVELOCK: Psychology of Sex. Vol. III.

*ESPINAS: Societes animales.

FABRE, J. HENRI: Moeurs des insectes.
Life and Love of Insects (_trans._).
Insect Life (_trans._).
Social Life in the Insect World (_trans._).

*FORBES, H.O.: A Naturalist's Wanderings.

*GALTON, FRANCIS: Natural Inheritance.
Average Contribution of Each Several Ancestor to the Total
Heritage of the Offspring. _Pro. Roy. Soc., London, LXI._

*GEDDES, PATRICK: _Articles_: "Reproduction," "Sex," "Variation" and
"Selection": _Encycl. Brit._

*GEDDES AND TOMPSON, A.J.: The Evolution of Sex. (_Cont. Sci.
Series._) _Rev. ed._
Problems of Sex.

*HAeCKER: Der Gesang der Voegel.

*HAECKEL: Generelle Morphologie der Organismen.
Evolution of Man (_trans._ by J. McCabe).

HERTWIG: The Biological Problem of To-day (_trans._ by P. Chalmers
Mitchell).

HOUZEAU: Etudes sur les facultes mentales des animaux compares a
celles de l'homme.

*HUDSON, W.H.: Argentine Ornithology.
The Naturalist in La Plata.
Birds and Man.

*HUXLEY, T.H.: A Manual of Invertebrate Animals.

KELLOGG: Studies of Variation in