CONTENTS. 



INTRODUCTION Pages 1-14 



CHAPTER I. 



DOMESTIC DOGS AND CATS. 



ANCIENT VARIETIES OF THE DOG — RESEMBLANCE OF DOMESTIC DOGS 

 IN VARIOUS COUNTRIES TO NATIVE CANINE SPECIES — ANIMALS NOT 

 ACQUAINTED WITH MAN AT FIRST FEARLESS — DOGS RESEMBLING 

 WOLVES AND JACKALS — HABIT OF BARKING ACQUIRED AND LOST 



FERAL DOGS TAN-COLOURED EYE-SPOTS — PERIOD OF GESTATION 



OFFENSIVE ODOUR — FERTILITY OF THE KACES WHEN CROSSED — 



DIFFERENCES IN THE SEVERAL RACES IN PART DUE TO DESCENT 

 FROM DISTINCT SPECIES — DIFFERENCES IN THE SKULL AND TEETH 



— DIFFERENCES IN THE BODY, IN CONSTITUTION FEW IMPORTANT 



DIFFERENCES HAVE BEEN FIXED BY SELECTION — DIRECT ACTION 

 OF CLIMATE — WATER-DOGS WITH PALMATED FEET — HISTORY OF 

 THE CHANGES WHICH CERTAIN ENGLISH RACES OF THE DOG HAVE 

 GRADUALLY UNDERGONE THROUGH SELECTION — EXTINCTION OF THE 

 LESS IMPROVED SUB-BREEDS. 



CATS, CROSSED WITH SEVERAL SPECIES — DIFFERENT BREEDS FOUND 



ONLY IN SEPARATED COUNTRIES DIRECT EFFECTS OF THE 



CONDITIONS OF LIFE — FERAL CATS — INDIVIDUAL VARIABI- 

 LITY 15-50 



CHAPTER II. 



HORSES AND ASSES. 



HOUSE. — DIFFERENCES IN THE BREEDS — INDIVIDUAL VARIABILITY 

 OF — DIRECT EFFECTS OF THE CONDITIONS OF LIFE — CAN WITHSTAND 

 MUCH COLD — BREEDS MUCH MODIFIED BY SELECTION— COLOURS OF 



