CONTENTS.


INTRODUCTION.


CHAPTER 1.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 RACES 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 VARIABILITY.