express too strongly my obligations to the many persons who have assisted
me, and who, I am convinced, would be equally willing to assist others in
any scientific investigation.)



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.