CONTENTS OF VOL. I. 



CHAPTEE VII. 



FOWLS. 



BRIEF DESCRIPTIONS OF THE CHIEF BREEDS — ARGUMENTS IN FAVOUR OF THEIR 

 DESCENT FROM SEVERAL SPECIES — ARGUMENTS IN FAVOUR OF ALL THE BREEDS 

 HAVING DESCENDED FROM GALLUS BANKIVA — REVERSION TO THE PARENT-STOCK 

 IN COLOUR — ANALOGOUS VARIATIONS — ANCIENT HISTORY OF THE FOWL — 

 EXTERNAL DIFFERENCES BETWEEN THE SEVERAL BREEDS — EGGS — CHICKENS — 

 SECONDARY SEXUAL CHARACTERS — WING- AND TAIL- FEATHERS, VOICE, DISPOSI- 

 TION, ETC. — OSTEOLOGICAL DIFFERENCES IN THE SKULL, VERTEBRA, ETC. — 

 EFFECTS OF USE AND DISUSE ON CERTAIN PARTS — CORRELATION OF GROWTH 



Page 225 



CHAPTEE 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, CATER- 

 PILLAR, AND COCOON STATES — INHERITANCE OF CHARACTERS — IMPERFECT WINGS 

 — LOST INSTINCTS — CORRELATED CHARACTERS 276 



CHAPTEE 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. 



CERE ALIA. — 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 305 



