OSITION, ETC.--OSTEOLOGICAL
DIFFERENCES IN THE SKULL, VERTEBRAE, ETC.--EFFECTS OF USE AND DISUSE ON
CERTAIN PARTS--CORRELATION OF GROWTH ... Page 225

CHAPTER VIII.

DUCKS--GOOSE--PEACOCK--TURKEY--GUINEA-FOWL--CANARY-BIRD--GOLD-FISH--
HIVE-BEES--SILK-MOTHS.

DUCKS, SEVERAL BREEDS OF--PROGRESS OF DOMESTICATION--ORIGIN OF, FROM THE
COMMON WILD-DUCK--DIFFERENCES IN THE DIFFERENT BREEDS--OSTEOLOGICAL
DIFFERENCES--EFFECTS OF USE AND DISUSE ON THE LIMB-BONES.

GOOSE, ANCIENTLY DOMESTICATED--LITTLE VARIATION OF--SEBASTOPOL BREED.

PEACOCK, ORIGIN OF BLACK-SHOULDERED BREED.

TURKEY, BREEDS OF--CROSSED WITH THE UNITED STATES SPECIES--EFFECTS OF
CLIMATE ON.

GUINEA-FOWL, CANARY-BIRD, GOLD-FISH, HIVE-BEES.

SILK-MOTHS, SPECIES AND BREEDS OF--ANCIENTLY DOMESTICATED--CARE IN THEIR
SELECTION--DIFFERENCES IN THE DIFFERENT RACES--IN THE EGG, CATERPILLAR, AND
COCOON STATES--INHERITANCE OF CHARACTERS--IMPERFECT WINGS--LOST
INSTINCTS--CORRELATED CHARACTERS ... Page 276

CHAPTER IX.

CULTIVATED PLANTS: CEREAL AND CULINARY PLANTS.

PRELIMINARY REMARKS ON THE NUMBER AND PARENTAGE OF CULTIVATED PLANTS--FIRST
STEPS IN CULTIVATION--GEOGRAPHICAL DISTRIBUTION OF CULTIVATED PLANTS.

CEREALIA.--DOUBTS ON THE NUMBER OF SPECIES.--WHEAT: VARIETIES
OF--INDIVIDUAL VARIABILITY--CHANGED HABITS--SELECTION--ANCIENT HISTORY OF
THE VARIETIES.--MAIZE: GREAT VARIATION OF--DIRECT ACTION OF CLIMATE ON.

CULINARY PLANTS.--CABBAGES: VARIETIES OF, IN FOLIAGE AND STEMS, BUT NOT IN
OTHER PARTS--PARENTAGE OF--OTHER SPECIES OF BRASSICA.--PEAS: AMOUNT OF
DIFFERENCE IN THE SEVERAL KINDS, CHIEFLY IN THE PODS AND SEED--SOME
VARIETIES CONSTANT, SOME HIGHLY VARIABLE--DO NOT
INTERCROSS.--BEANS.--POTATOES: NUMEROUS VARIETIES OF--DIFFERING LITTLE,
EXCEPT IN THE TUBERS--CHARACTERS INHERITED ... Page 305

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CHAPTER X.

PLANTS _continued_--FRUITS--ORNAMENTAL TREES--FLOWERS.

FRUITS.--GRAPES--VARY IN ODD AND TRIFLING PARTICULARS.--MULBERRY.--THE
ORANGE GROUP--SINGULAR RESULTS FROM CROSSING.--PEACH AND
NECTARINE--BUD-VARIATION--ANALOGOUS VARIATION--RELATION TO THE
ALMOND.--APRICOT.--PLUMS--VARIATION IN THEIR STONES.--CHERRIES--SINGULAR
VARIETIES OF.--APPLE.--PEAR.--STRAWBERRY--INTERBLENDING OF THE ORIGINAL
FORMS.--GOOSEBERRY--STEADY INCREASE IN SIZE OF THE FRUIT--VARIETIES
OF.--WALNUT.--NUT.--CUCURBITACEOUS PLANTS--WONDERFUL VARIATION OF.

ORNAMENTAL TREES--THEIR VARIATION IN DEGREE AND
KIND--ASH-TREE--SCOTCH-FIR--HAWTHORN.

FLOWERS--MULTIPLE ORIGIN OF MA