CATTLE--ZEBU A DISTINCT SPECIES--EUROPEAN CATTLE PROBABLY DESCENDED FROM THREE WILD FORMS--ALL THE RACES NOW FERTILE TOGETHER--BRITISH PARK CATTLE-- ON THE COLOUR OF THE ABORIGINAL SPECIES--CONSTITUTIONAL DIFFERENCES--SOUTH AFRICAN RACES--SOUTH AMERICAN RACES--NIATA CATTLE--ORIGIN OF THE VARIOUS RACES OF CATTLE. SHEEP--REMARKABLE RACES OF--VARIATIONS ATTACHED TO THE MALE SEX-- ADAPTATIONS TO VARIOUS CONDITIONS--GESTATION OF--CHANGES IN THE WOOL--SEMI- MONSTROUS BREEDS. GOATS--REMARKABLE VARIATIONS OF. CHAPTER 1.IV. DOMESTIC RABBITS. DOMESTIC RABBITS DESCENDED FROM THE COMMON WILD RABBIT--ANCIENT DOMESTICATION--ANCIENT SELECTION--LARGE LOP-EARED RABBITS--VARIOUS BREEDS-- FLUCTUATING CHARACTERS--ORIGIN OF THE HIMALAYAN BREED--CURIOUS CASE OF INHERITANCE--FERAL RABBITS IN JAMAICA AND THE FALKLAND ISLANDS--PORTO SANTO FERAL RABBITS--OSTEOLOGICAL CHARACTERS--SKULL--SKULL OF HALF-LOP RABBITS-- VARIATIONS IN THE SKULL ANALOGOUS TO DIFFERENCES IN DIFFERENT SPECIES OF HARES--VERTEBRAE--STERNUM--SCAPULA--EFFECTS OF USE AND DISUSE ON THE PROPORTIONS OF THE LIMBS AND BODY--CAPACITY OF THE SKULL AND REDUCED SIZE OF THE BRAIN--SUMMARY ON THE MODIFICATIONS OF DOMESTICATED RABBITS. CHAPTER 1.V. DOMESTIC PIGEONS. ENUMERATION AND DESCRIPTION OF THE SEVERAL BREEDS--INDIVIDUAL VARIABILITY-- VARIATIONS OF A REMARKABLE NATURE--OSTEOLOGICAL CHARACTERS: SKULL, LOWER JAW, NUMBER OF VERTEBRAE--CORRELATION OF GROWTH: TONGUE WITH BEAK; EYELIDS AND NOSTRILS WITH WATTLED SKIN--NUMBER OF WING-FEATHERS AND LENGTH OF WING- -COLOUR AND DOWN--WEBBED AND FEATHERED FEET--ON THE EFFECTS OF DISUSE-- LENGTH OF FEET IN CORRELATION WITH LENGTH OF BEAK--LENGTH OF STERNUM, SCAPULA, AND FURCULUM--LENGTH OF WINGS--SUMMARY ON THE POINTS OF DIFFERENCE IN THE SEVERAL BREEDS. CHAPTER 1.VI. PIGEONS--continued. ON THE ABORIGINAL PARENT-STOCK OF THE SEVERAL DOMESTIC RACES--HABITS OF LIFE--WILD RACES OF THE ROCK-PIGEON--DOVECOTE-PIGEONS--PROOFS OF THE DESCENT OF THE SEVERAL RACES FROM COLUMBA LIVIA--FERTILITY OF THE RACES WHEN CROSSED--REVERSION TO THE PLUMAGE OF THE WILD ROCK-PIGEON-- CIRCUMSTANCES FAVOURABLE TO THE FORMATION OF THE RACES--ANTIQUITY AND HISTORY OF THE PRINCIPAL RACES--MANNER OF THEIR FORMATION--SELECTION-- UNCONSCIOUS SELECTION--CARE TAKEN BY FANCIERS IN SELECTING THEIR BIRDS-- SLIGHTLY DIFFERENT STRAINS GRADUALLY CHANGE INTO WELL-MARKED BREEDS-- EXTINCTION OF INTERMEDIATE FORMS--CERTAIN BREEDS REMAIN PERMANENT, WHILST OTHERS CHANGE--SUMMARY. CHAPTER 1.VII. FOWLS.