igo Index. 



India, European dogs in, 30 



, cats of, 31 



, dun-striped race of horse in, 33 



, domestic pig in, 39 



, Portuguese connection with, its results, 39 



, shallow water from, to Java, 163 



, supposed former continent connecting South Africa and, 



163 

 Indian wild boar, 39 



, extinct, ruminant Sivatherium, 48 



local race of Galhis ferrugine^ls^ 82 



rock dove, 59 



tiger, 83 



, West, islands, extinct mammals on, 159 



Archipelago, 162 



fauna, 164 



Indians in South America have bred the niata cow apart, 48 

 Indies, West, feral pigs in, 38 



, feral guinea-fowl in, 71 



Individual variability, 70 



Inheritance, why it appears more certain in the horse than in 



other animals, 34 



, strength of, shown in sub-breeds of the hog, 37, 38 



not shown not to be absolute, 45, 46 



, principle of, its strength shown in the fantail pigeon t 



67 

 , we ought to start from the permanence of, and then see 



what subtractions, if any, have to be made, 92 

 Insectivora and canidae, links between supposed, 133 

 Instinctive actions of animals, not safe to interpret anthropo- 



pathically, 142 



Intermediate forms in nature, how to be accounted for, 75 

 Intermixture in nature, a known cause, 77 

 Islands, mammals, why not often found on, 157 



