PAGE
Abyla[63]
Acanthometra[57]
Actinea Cari, varieties of[66]
—— mesembryanthemum[54]
Acanthostratus[57]
Actinozoa[51], [52]
Æschna[77]
Agalma breve[64]
Agrion puella[77]
Aiptasia mutabilis[67]
Albinism in butterflies[79]
Alcyonariæ[54]
Allman, Prof., on Hydroids[59], [60]
"Alps and Sanctuaries" quoted[36]
Amœba[56]
Amphibia[89]
Amphilonche[57]
Andres, Dr., on Hydrozoa[65]
Anemonia sulcata[67]
Anemones, Sea[52]
Animals and Plants, origin of[36]
—— classification of[49]
Anœchtochilus[95]
Anteater[93]
Anthocaris belemia[41]
—— belia[42]
—— cardamines[41], [42]
—— euphemoides[43]
—— eupheno[42]
—— simplonia[42]
Apatura iris[46]
—— larvæ of[81]
Arachnida[82]
Araschnia Levana[43], [45]
—— porima[43], [45], [79]
—— prorsa[43], [45]
Arctia[69]
Arachnocorys[57]
Argus Pheasant[6], [39], [91]
Argynnis Lathonia[69]
Armadillo[84]
Arthropoda, colouration of[85]
Ascidians[35]
Automatic habits[9]
Arthorybia rosacea[64]
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 mœnas[4]
Carcinus mœnas[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]
Cœlenterata[20]
—— colouration in[51]
Cœlodendrum[57]
Cœnonympha davus[79]
—— pamphilus[79]
Cœnosarc[55]
Coleus[95]
Colour and form[32]
—— and transparency[53]
—— epidermal[72]
—— following structure[83], [91]
—— hypodermal[53], [73]
—— nature of[25]
—— of day-and-night flying insects[47], [69]
—— opaque[53]
—— perception of[5], [23], [25], [32]
—— uniform, why rare[28]
Colouration[3]
—— laws of[21], [51]
—— of desert animals[4]
—— of arthropoda[85]
—— of cœlenterata[51], [59]
—— of insects[68]
—— of invertebrata[49]
—— of molluscs[85]
—— of plants[94]
—— of protozoa[51]
—— of spiders[82]
—— of vertebrata[88]
—— sexual[5]
—— varieties of[3]
Contour feathers[91]
Conus[86]
Coppinia arcta[60]
Corallium rubrum[54]
Corals[54]
Correlation of teeth and hair[94]
Corynida[52]
Cowries[86]
Crab, shore[4]
Croton[46]
Cuttle-fishes[19], [87]
Cyllo leda[45]
Cynthia cardui[68]
Cypræa[86]
Cyrtidosphæra[57]
Dallas, W. S., on butterflies[71]
Danais[72]
—— niavius[30], [80]
Darwin, C.[1], [2], [5], [9], [11], [14], [45], [47], [94]
Darwin, Dr. E., cited[37]
Deer[92]
Deformity, antipathy to[32]
Deilephila Euphorbiæ[81]
—— galii[81]
Descent with modification[1]
Desert animals, colour of[4]
Dictyoceras[57]
Dictyophimus[57]
Diphyes[63]
Disease, markings in[39], [44]
Distant, W. L., on Malayan butterflies[80]
Distinctive Colouration[3]
Dogs recognising portraits[32]
Dracæna ferrea[96]
Elephant, increase of[2]
Engelmann on Euglena[34]
Epidermal colour[72]
Eresus cinnabarinus[82]
Eucecryphalus[57]
Eucrytidium[57]
Euglena viridis[34]
Evolution[1]-[98]
Eye-spots[45], [47]
Fayrer, Sir W., on snakes[89]
Feathers[91]
Fishes, colours of[88]
Foal, stripes on[46]
Foraminiferæ[56]
Fuller, W. J., on aquatic larvæ[77]
Gamopetalous flowers[96]
Gegenbaur's "Comparative Anatomy" cited[82]
General colouration[3]
Gloxinia[96]
Gomphina[77]
Gonepteryx Cleopatra[41], [42]
—— rhamni[40], [42]
Gonophores[52]
Grapta interrogationis[79]
Gregarinidæ[56]
Guinea-fowl[91]
Haagen, Dr., on colour[53], [72]
Habits[8]
Haeckel, Prof., on Radiolaria[57]
Hair and teeth, correlation of[94]
Hawk moths[69]
Hebrides, colours of insects in[80]
Heredity[2]
Herpes[40], [93]
Heteromorphism[78]
Higgins, Rev. H. H.[39]
Hoverer flies[84]
Humming birds[90], [92]
Hutchinson, Mr., on herpes[40]
Huxley, Prof., on hydrozoa[63]
Hydra viridis[59]
Hydrida[59]
Hydrozoa[51], [59]
Hypodermal colour[53], [72]
Identity of offspring and parent[11]
Identity, personal[10]
Inherited memory[8]
Insects, colour in[68], [75]
John Dory[89]
Kallima inachus[30], [80]
Kentish Glory Moth[30]
Lamium galeobdolon[96]
Lankester, Prof. Ray, on development of eyes[97]
Large Copper Butterfly[68]
Larvæ, colours of[45], [81]
Laws of emphasis[21]
—— exposure[18]
—— heredity[2]
—— multiplication[2]
—— repetition[21], [22]
—— structure[18]
—— variation[2]
Leaf-butterfly[16], [30]
Leidy, Prof., on Rhizopoda[56]
Leopard[17], [92]
Leucophasia diniensis[41]
—— sinapis[41]
"Life and Habit" cited[9]
Light, reflected[26]
—— sensibility to[33]
—— waves[25]
Liminitis sibilla[43]
Lion[17], [92]
—— stripes on young[46]
Lithocysts of hydroids[62]
Lucernaria auricula[65]
Lycæna dispar[68]
Lycosa agretyca[83]
—— allodroma[83]
—— andrenivora[83]
—— cambria[84]
—— campestris[83]
—— latitans[84]
—— picta[84]
—— piratica[84]
—— rapax[83]
Mackerel[88]
Mactra[86]
—— stultorum[87]
Madrepores[54]
Mammalia, colouration in[92]
Margarita catenata[87]
Measles[39]
Medusæ[52], [65]
Melanism in insects[79]
Meldola, Prof. R., on Melanism[79]
Melitæa artemis[43]
—— athalia[43]
Mimicry[3], [4]
Mollusca[21]
—— colouration in[85]
Monstrosities, antipathy to[32]
Morphinæ[72]
Morpho[4]
Murex[86]
Muscles of insects[71]
Nectarinea chloropygea[90]
Newman, Mr., on varieties of butterflies[77]
Newts[89]
Nitzsch on feather-tracts[91]
Nudibranchs[85]
Nymphalidæ[74]
Oak Egger Moth[30]
Ocelli[47]
Ocelot[93]
Oliva[86]
Opaque colouring[53]
Organ-pipe coral[54]
Origin of animals and plants[36]
—— — species[1]
Orthopœcilism[78]
Oxen[94]
Painted Lady Butterfly[68]
Pangenesis[12]
Papilio Ajax[79]
—— machaon[43], [68], [76], [78]
—— —— larva of[81]
—— merope[30], [76], [80]
—— nireus[14]
—— podalirius[43]
Paradisea Papuana[90]
—— regia[90]
—— speciosa[90]
—— Wallacei[90]
—— Wilsoni[90], [91]
Pavetta Borbonica[96]
Pecten[86]
Pelargonium[96]
Perch[88]
Personal identity[10]
Physalia[63]
—— caravilla[64]
—— pelagica[64]
—— utriculus[64]
Physophoridæ[63]
Plaice[88]
Plants and animals, origin of[36]
—— colour in[95]
Pneumatophores[63]
Portuguese Man o' War[63]
Protective resemblance[3]
Protista[34]
Protozoa[20]
—— colouration in[51], [56]
Python[89]
Radiolaria[57]
Rarity of uniform colour[28]
Ray Lankester, Prof., on Ascidians[35]
Red Admiral Butterfly[29]
Repetition, effects of[8]
Reptilia, colouration in[89]
Resemblance, Protective[3]
Rhizophora filiformis[64]
Rhizopoda[56]
Rhododendron[96]
Ringlet Butterflies, eye-spots of[47]
Roach[88]
Romanes, Prof., cited[33], [34]
Satyrus hyperanthus[79]
Scales of insects, structure of[72]
Scarlet Tiger Moth[5]
Sea anemones[52]
—— —— colours of[67]
Seasonal dimorphism[70]
Sea squirts[35]
Segestria senoculata[83]
Selection, sexual[5]
Self-coloured flowers[28]
Sense organs of Butterflies[30]
Sertularidæ[63]
Sexual colours[4]
—— selection[5]
—— dimorphism[70]
Shell, Structure of[85]
Shore Crab[4]
Simple variation in Butterflies[77]
Siphonophora[63]
Small pox[39]
Snakes, patterns of[89]
Sollas, Prof., on Sponges[58]
Soles[88]
Sparassus smaragdulus[82]
Species, origin of[1]
Sphæronectes[63]
Sphingidæ[45], [69]
Spiders, structure and colour of[82]
Spiracles of larvæ[22]
Spondylus[86]
Sponges[57]
Spongida[57]
Spongocyclia[57]
Spots and Stripes[39]
Stephanomia amphitridis[63]
Struggle for existence[2]
Sun-birds[90]
Sus vittatus[46], [94]
Sutton, Mr. Bland, on Herpes[40]
Swallow-tailed Butterflies[68]
Syncoryne pulchella[62]
Systems of colouration[51]
Teeth and Hair, correlation of[94]
Thomisus cinereus[82]
—— floricolens[82]
Thomisus luctuosus[84]
—— trux[82]
Thrush, increase of[2]
Tiger[17], [92]
—— Moths[69]
Tipula[33]
Toucans[90], [92]
Transparency and colour[53]
Trigonia[86]
Tubipora musica[54]
Tubularida[59]
Tylor, A., on Specific change[10]
Vanessa Antiopa[76]
—— atalanta[29], [43], [69]
—— urticæ[77]
Variation in insects[70]
—— law of[2]
—— simple, in Butterflies[77]
Velella[52], [65]
Vertebrata, colouration of[88]
Viverridæ[94]
Wallace, A. R., on sexual selection[5], [6], [14], [15]
—— on colour[29]
—— on abnormal structures[94]
Warning colours[4]
Wasps[84]
Weir, J. Jenner, on variation in insects[78]
Weismann, Dr., on Caterpillars[81]
Wing of Butterfly, typical[70]
—— patterns of[76]
Woodpecker[91]
Yellow Archangel[96]
Zebra[92]
Zygæna[69]

Fig. 4.—Python.
Showing vertebra-like markings.

Fig. 5.—Tiger.
The pattern changes at the points lettered.