INDEX OF SUBJECTS 



Parrot, 250-252, 284 



Patella, 185, 191 



Patterns. See Markings 



Peach -coloured Bacterium, 51-53 



Peacock, 8, 244, 271 



Peclen, 186, 189 



Pectinarla, 102 



Pelobates, 235 



Pennatula, phosphorescence of, ig 



Pentacrinih, 135, 137 



Pentacrinus, 132, 135 



Pericrocotus, 245 



Peziza, 54 



Phasodellas, 75 



Phaeodia, 75 



Phisthorhis, 275 



Phascolosoma, loi 



Pheasant, 251 



Phidippus, 179 



Pkolas, phosphorescence of, 18 



Phoronis, hasmoglobin in, 30 



Phosphorescence, 15-24 



Photo - bacteHuvt phosphorescens, 



phosphorescence of, 16 

 Phycocyan, 43 

 Phycoerythrin, 57, 58 

 Phyllirhoe, phosphorescence of, 18- 



20 

 Phyllium, 166, 167 

 Physalia, phosphorescence of, 17 

 Pieridse, pigments of, 36, 48, 149- 



155. 174 

 Pigmental colours, definition of, 7 

 Pllobolus, pigment of, 40, 41 

 Pleuronecies, 213, 215, 217, 220, 



221 

 Pleuronectidse, 214-219, 222 

 Pneumora, 165 

 Podiceps, 260 

 Polar bear, 288 

 PolychEeta, 102 

 Poly gala vulgaris, 68 

 Polyperythrin, 92 

 Polyzoa, 111-116, 294, 296 

 Protective coloration, 225, 302- 



305. 312, 317. 321-324 

 Protopterus, 27, 224 

 Protozoa, pigments of, 43, 59, 73-78 

 Pse'udoscarus, 211 

 Piilonorhynchus , 244 

 Piiloris, 281 



343 



Pulmonaria, 71 



Purple pigments, 43, 44, 52, 112, 

 115, 134, 191, 208. See also 

 Antedonin , Pentacrinin , and 

 Turacin 



Purpura, pigment of, 26, 184, 187 



Pygcsra, 303 



Pyranga, 247 



Pyrosoma, phosphorescence of, 18, 



19 

 Pyrotrogon, 255 

 Pyi-rhocoris , 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, 

 i75> 205, 224. See also 

 Anthocyan, Araroth, Carmine, 

 Carotin, Crustaceorubrin, 

 Hasmerythrin, Haemoglobin, 

 Phycoerythrin, Tetronerythrin , 

 Zoonerythrin, Zoorubin 



Respiratory pigments, 29-32, 34, 

 297 



Retinal purple, 313 



Rhizocrinus, 132 



Rhizostoma, 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, 



233 

 Salmon, pigments of, 39, 40, 145 

 Samia, 157 



Sand-stars. See Ophiuroids 

 Saxifraga sarmeniosa, 63 

 Scalaria, 187 

 Scales of butterflies, 147-150, 156- 



158, 177, 178 

 Schizorrhis, 253 

 Scomber, 223 



Sea- cucumbers. See Holothuria 

 urchins, 131, 134 



