Badger 93 _Begonia_ 95 Birds, colouration of 89 ---- of Paradise 90 _Biston betularia_ 79 Black and White, production of 28 Blackwell, J., on British Spiders 82 _Blatta_ 14 Bougainvillea 16 Bower Birds 5 _Bunodes crassicornis_ 54 ---- _gemmaceus_, varieties of 66 ---- _rigidus_ 67 Burnet Moths 5, 69 Butler S., on inherited memory 9, 10, 11, 15 ---- on origin of animals and plants 36 Butterflies, albinism in 79 ---- classification of 74 ---- sense organs of 30 ---- varieties of 77 _Caladium_ 95 _Calathea_ 96 _Calycophoridæ_ 63 _Carcinus moenas_ 4 _Carpocanium_ 57 Cats, colouration of 17, 92 ---- recognising form 32 Caterpillars, colours of 81 ---- spiracular markings 22 _Cephalopoda_ 87 _Cerithium_ 86 Char 88 Chlorophyll in hydra 59 Cicada 77 _Cladococeus_ 57 Classification of animals 49 ---- of butterflies 74 _Coelenterata_ 20 ---- colouration in 51 _Coelodendrum_ 57 _Coenonympha davus_ 79 ---- _pamphilus_ 79 Coenosarc 55 _Coleus_ 95 Colour and form 32 ---- and transparency 53