CHAPTER VII.. Fowls.

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