Furculæ of Pigeons ... 167 30. Spanish Fowl ... 226 31. Hamburgh Fowl ... 228 32. Polish Fowl ... 229 33. Occipital Foramen of the Skulls of Fowls ... 261 34. Skulls of Fowls, viewed from above, a little obliquely ... 262 35. Longitudinal sections of Skulls of Fowls, viewed laterally ... 263 36. Skull of Horned Fowl, viewed from above, a little obliquely ... 265 37. Sixth Cervical Vertebræ of Fowls, viewed laterally ... 267 38. Extremity of the Furcula of Fowls, viewed laterally ... 268 39. Skulls of Ducks, viewed laterally, reduced to two-thirds of the natural size ... 282 40. Cervical Vertebræ of Ducks, of natural size ... 283 41. Pods of the Common Pea ... 328 42. Peach and Almond Stones, of natural size, viewed edgeways ... 337 43. Plum Stones, of natural size, viewed laterally ... 345 THE VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION. By Charles Darwin IN TWO VOLUMES.-Vol. II. WITH ILLUSTRATIONS. INDEX CONTENTS OF VOLUME II. CHAPTER XII. INHERITANCE. WONDERFUL NATURE OF INHERITANCE—PEDIGREES OF OUR DOMESTICATED ANIMALS—INHERITANCE NOT DUE TO CHANCE—TRIFLING CHARACTERS INHERITED—DISEASES INHERITED—PECULIARITIES IN THE EYE INHERITED—DISEASES IN THE HORSE—LONGEVITY AND VIGOUR—ASYMMETRICAL DEVIATIONS OF STRUCTURE—POLYDACTYLISM AND REGROWTH OF SUPERNUMERARY DIGITS AFTER AMPUTATION—CASES OF SEVERAL CHILDREN SIMILARLY AFFECTED FROM NON-AFFECTED PARENTS—WEAK AND FLUCTUATING INHERITANCE: IN WEEPING TREES, IN DWARFNESS, COLOUR OF FRUIT AND FLOWERS, COLOUR OF HORSES—NON-INHERITANCE IN CERTAIN CASES—INHERITANCE OF STRUCTURE AND HABITS OVERBORNE BY HOSTILE CONDITIONS OF LIFE, BY INCESSANTLY RECURRING VARIABILITY, AND BY REVERSION—CONCLUSION ... Page 1 CHAPTER XIII. INHERITANCE continued—REVERSION OR ATAVISM. DIFFERENT FORMS OF REVERSION—IN PURE OR UNCROSSED BREEDS, AS IN PIGEONS, FOWLS, HORNLESS CATTLE AND SHEEP, IN CULTIVATED PLANTS—REVERSION IN FERAL ANIMALS AND PLANTS—REVERSION IN CROSSED VARIETIES AND SPECIES—REVERSION THROUGH BUD-PROPAGATION, AND BY SEGMENTS IN THE SAME FLOWER OR FRUIT—IN DIFFERENT PARTS OF THE BODY IN THE SAME ANIMAL—THE ACT OF CROSSING A DIRECT CAUSE OF REVERSION, VARIOUS CASES OF, WITH INSTINCTS—OTHER PROXIMATE CAUSES OF REVERSION—LATENT CHARACTERS—SECONDARY SEXUAL CHARACTERS—UNEQUAL DEVELOPMENT OF THE TWO SIDES OF THE BODY—APPEARANCE WITH ADVANCING AGE OF CHARACTERS DERIVED FROM A CROSS—THE GERM WITH ALL ITS LATENT CHARACTERS A WONDERFUL OBJECT—MONSTROSITIES—PELORIC FLOWERS DUE IN SOME CASES TO REVERSION ... Page 28 CHAPTER XIV. INHERITANCE continued—FIXEDNESS OF CHARACTER—PREPOTENCY—SEXUAL LIMITATION—CORRESPONDENCE OF AGE.