312 



INDEX OF SUBJECTS 



Plaice, carotin in skin of, 147. 



Plantago (plaintain), 44. 



Plant lice, green, carotinoids in, 158, 



171. 



Plant tissues, microchemical identifica- 

 tion of carotinoids in, 240-242. 



Plaster of Paris, as aid in isolation of 

 carotin from blood, 207. 



Platanus acerijolia, 255; Platanus ori- 

 entalis, 58. 



Platisama Cocropia, 157. 



Pleotrachelus julgens, 118. 



Pleuroncctes fiesus, 147; P. platessa, 

 147; P. limanda, 147; P. microccpha- 

 lus, 147. 



Poison ivy, autumn pigments of, 58. 



Polychaetes, carotinoids in, 168. 



Polychrome, 56. 



Polycystin from Polycyslis flos aquae, 

 relation of to carotin, 112. 



Polygonum sachalincnse, 68. 



Polyidcs rotundas, 101. 



Polynpe spinifcra, 168. 



Polysiphonia species, 101; Polysiphonia 

 nigresccns, 101. 



Polystigma rubrum, 116, 117; P. Ochra- 

 ceum (P. julvum D. Cj, 116, 117, 

 118. 



Polystigmin, properties of, 117. 



Polyzoa, lipochrome in cuticular skele- 

 ton of, 168. 



Pond Lily, European, carotinoids in, 

 74. 



Pond weed, rhodoxanthin in, 47, 66, 216. 



Pontellina gigantca, 164. 



Poplar, autumn pigments of, 58, 60. 



Poppy, Welsh, carotinoids in, 74. 



Populus alba, 58; Populus canadcnsis, 

 255; Populus jatstigiata, 55; Populus 

 nigra, 58; Populus tremula, 58. 



Porifera, 169. 



Porphyra liiemalis, 101 ; Porphyra laci- 

 niata, 101 ; Porphyra vulgaris, 100, 

 101. 



Postmortal phase of autumn colora- 

 tion, 56, 63. 



Potamogeton natans, 47, 66, 216. 



Potassium dichroniate standard, color 

 of in comparison with carotinoids, 

 253, 254, 260. 



Potato leaves, carotin content of, 249. 



Potato sprouts, effect of light and dark 

 on carotinoids in, 53. 



Potato, sweet (Ipomoca batatas), 28. 



Prawns, carotinoids in, 161. 



Primrose, European Evening, carotin- 

 oids in, 74. 



Primula officinalis, 72. 



Privet, winter reddening of, 65. 



Promycelia spores, 114, 116. 



Prorocentum micans, 108. 

 Protochlorphyll, relation of to etiolin,, 



50. 

 Protococcus (Pleurococcus) pluvialis, 



105; P. vulgaris, 105. 

 P run us armcniaca, 76; Prunus avium, 



68; Prunus cerasus, 34, 56. 

 Pseudozoorubin, 143. 

 Psuttacofulvine, 144. 

 Ptelca trijoliata, 58. 

 Pti-ris aquilina, 249. 

 Ptychandra glauca Scheff., 77. 

 Ptychosperma elegans Blume, 77. 

 Puccinia coronata, 114. 

 Puff-balls, 113. 



Pumpkin, carotin in, 36, 78, 79. 

 Pygacra Bucephalus, 156; P. meticw- 



losa, 156. 



Pylaiella litoralis, 95. 

 Pyrenomycetes, 116, 117, 123. 

 P yroccphalu-s rubincus, 144. 

 Pyrrhula rulgaris, 144. 

 Pyrus communis, 29, 56, 58; Pyrus ger- 



inanica, 58; Pyrus ussuriensis, 58. 



(Jinrcus rubra, 58, 60; Quercus Robur, 

 58. 



Rana esculcnta, 149, 185. 



Ranunculus, 69; Ranunculus acris L., 

 73; R. Aricomus, 74; R. Ficaria, 74; 

 R. gramincus, 74; R. rcpens, 74. 



Rape leaves, carotin content of, 249. 



Rape seed, effect of on color of egg 

 yolks, 87. 



Rape-seed oil, pigment of not carotin- 

 oid, 87. 



llnphanus raphanistrum L., 73. 



Rats, growth of on carotinoid-free diets, 

 270. 



Red Algae, carotinoids in, 100-102. 



Red currant leaves, carotin content of, 

 249. 



Red pepper pigment, 69, 82; feeding 

 of to canaries and fowls, 187. 



Red xanthophyll, 20, 47. 



Reptiles, carotinoids in, 149, 150. 



Retina, carotinoids in, 126, 140-142, 

 149, 152. 



Retinal epithelium, absence of col- 

 ored globules from in cow, man, pig, 

 and snakes, 142. 



Retinostora plumosa, 59. 



h'hiiuscis scalaris, 150. 



Rhodophane, 23; in bird feathers, 143; 

 relation of to zoonerythrine, 143; iu 

 bird retinas, 141-142; relation of to 

 tetronerythrine, 142; in Crustacea, 

 162; in echinoderms, 166; in worms, 

 168. 



