INDEX 



263 



Ichneumons, 85 



Imitation, 251-253 



Incubation, 101, 145, 156-158 



Insectivora, 175, 220 



Insects, 31, 34, 54, 55, 58, 123, 233 



Instincts, 55, 131, 152, 166, 221, 229-239, 



242, 243, 254 



Institution, Royal, 199, 200 

 Intellect, 182 

 Intelligence, and duration of youth, 41 



and instinct, 229 



of birds, 50 



of insects, 55 

 Intestines, 187 

 Invertebrates, temperature of, 50 



JACAMAR, 153 



Jackal, 86 



Jaguar, 10, 41, 75, 78, 81, 85 



Japanese ape, 39, 165 



deer, 92 



Jardin des Plantes, 60 

 Jelly-fish, 118 

 Judgment, 250 

 Jungle-fowl, 106 



KAKAPO, 149 



Kaleidoscope, 64 



Kangaroo, 3, 46, 75, 77, 164, 179, 241 



Kephir, 186 



" Khaki," 78 



Kingfishers, 100, 102, 103, HI, 149, 153 



King-penguin, no 



Kittens, 3, 190 



Klipspringer, 89 



Koala, 181 



Kob, 89 



Kumiss, 186 



LANDSNAILS, 130 



Langur monkey, 165 



Lapwing, 99 



Lark, 103 



Larvae, 17, 18, 19, 36, 117, 224 



of ascidian, 19 



of blow-fly, 31 



campodeiform, 55 



echinoderm, 22 



of eels, 53 



Larvas, of fish, 52 



of mussel, 129 



Lavatory, chimpanzee and, 210 

 Leaf-insect, 124 



Leaves chosen by mammals, 243 

 Leeches, 120 

 Lemmings, 178 

 Lemurs, 83, 166, 167, 184, 200 

 Leopards, 10, 41, 75, 78, 81, 85, 213 

 Leptocephali, 53 

 Lice, 82 



Life, family, in invertebrates, 132 

 Light, 77, 232 

 Limitation of families, 118 

 Limpet, 130 

 Linsang, 85 



Lion, 10, 41, 62, 75, 84, 85, 166, 249 

 Litter, 193 

 Lizards, 15, 75 



breeding, 145 



food, 72, 195 



sexual coloration, 70 



skin glands, 184 



viviparous, 145 

 Llama, 46, 93, 218 

 Loach, 130 

 Lobster, 121 

 Locomotion, 239 

 Locust, 35, 124 



London, birds in the parks, 207 

 Longevity and duration of youth, 40 

 Lumpsucker, 135 

 Lungfish, 17, 67, 13 

 Lynx, 10, 41, 84, 85 



MACAQUES, 39 



Mackerel, 117 



Madness, 228 



Mammals, armour of extinct, 8l 



birth of, 165 



brood-care, 163 



coloration, 97 



compared with birds, 49 



duration of youth, 37 



geological age of, 163 



learning to feed, 243 



moult of, 82 



patterns of, 96 



size of, 47 



