INDEX OF SUBJECTS 
343 
Parrot, 250-252, 284 
Patella , 185, 191 
Patterns. See Markings 
Peach-coloured Bacterium, 51-53 
Peacock, 8, 244, 271 
Pecten , 186, 189 
Pectinaria, 102 
Pelobates, 235 
Pennatula , phosphorescence of, 19 
Pentacrinin, 135, 137 
Pentacrimis , 132, 135 
Pericrocotus, 245 
Peziza, 54 
Pbaeodellae, 75 
Phaeodia, 75 
Phathornis , 275 
Phascolosoma, 101 
Pheasant, 251 
Phidippus, 179 
Pkolas, phosphorescence of, 18 
Phorotiis, haemoglobin in, 30 
Phosphorescence, 15-24 
Photo - bacterium phosphorescens, 
phosphorescence of, 16 
Phycocyan, 43 
Phycoerythrin, 57, 58 
Phyllirhoe, phosphorescence of, 18- 
20 
Phyllium, 166, 167 
Physalia, phosphorescence of, 17 
Pieridas, pigments of, 36, 48, 149- 
I 5 S. z 74 
Pigmental colours, definition of, 7 
Pilobolus, pigment of, 40, 41 
Pleuronectes , 213, 215, 217, 220, 
221 
Pleuronectidae, 214-219, 222 
Pneumora, 165 
Podiceps, 260 
Polar bear, 288 
Polychaeta, 102 
Polygala vulgaris , 68 
Polyperythrin, 92 
Polyzoa, 111-116, 294, 296 
Protective coloration, 225, 302- 
305. 3 I2 > 3 Z 7 > 3 2 I_ 3 2 4 
Protopterus , 27, 224 
Protozoa, pigments 01,43, 59 . 73-78 
Pseudoscarus, 211 
Ptilonorhynchus , 244 
Ptiloris, 281 
Pulmonaria, 71 
Purple pigments, 43, 44, 52, 112, 
115, 134, 191, 208. See also 
Antedonin, Pentacrinin, and 
Turacin 
Purpura , pigment of, 26, 184, 187 
Pygcera, 303 
Pyranga, 247 
Pyrosoma , phosphorescence of, 18, 
z 9 
Pyrotrogon, 255 
Pyrrkocoris, 171 
Races of Britain, quoted, 289 
Radiolaria, 74, 75 
Red Algae, pigment of, 34, 57, 58, 79 
Red fruits, 59 
pigments, 46, 47, 51-53, 69, 
73-76, 94, 97, 135, 151, 153, 
175, 205, 224. See also 
Anthocyan, Araroth, Carmine, 
Carotin, Crustaceorubri n, 
Haemerythrin, Haemoglobin, 
Phycoerythrin, Tetronerythrin, 
Zoonerythrin, Zoorubin 
Respiratory pigments, 29-32, 34, 
2 97 
Retinal purple, 313 
Rhizocrinus, 132 
Rkizostotna, 92, 93 
Rhombus, 217, 218 
Rhynchodemus, 97 
Rifle-birds, 279, 281 
Roses, 68, 69 
Sabella, 103-105 
Sagartia abyssicola, phosphores¬ 
cence of, 17 
Salamander, 216, 225, 228, 232, 
2 33 
Salmon, pigments of, 39, 40, 145 
Samia, 157 
Sand-stars. See Ophiuroids 
Saxifraga sarmentosa, 63 
Scalaria, 187 
Scales of butterflies, 147-150, 156- 
158, 177, 178 
Schizorrhis, 253 
Scomber, 223 
Sea-cucumbers. See Holothuria 
urchins, 131, 134 
