374 



INDEX 



Palinurus vulgaris, 67, 316, 



Plates 51, 114 

 Palolo worm, 250, Plate 89 ; 



Atlantic, 252, Plate 93 

 Pandalus, 317 

 Paragorgia, 70 

 Parasites, 210, plate 81 

 Passive defence, 42 

 Patella, 32 ; P. vulgaris, 67, 316, 



Plate 8 

 Pea crab, 45, 213 

 Pearl fisheries, 347 

 Pearl Oyster, 346, Plates 121, 



123 

 Pearls, 345 ; Artificial, 351 ; 



Culture, 349 ; Formation of, 



346, Text fig. 64 ; Structure, 



347, Plate 123. 



Pecten, 33 ; P. maximus, 69, 



306, Plate 110 ; P. opercularis, 



74, 306, Text fig. 11 ; Plate 110 

 Peculiarities of shore animals, 41 

 Pelagia nociiluca, 189, Plate 73 

 Pelagic deposits, 55 

 Pelvetia canaliculata, 30, Plate 9 

 Pennatula phosphorea, 189, Plate 



73 

 Peridinium depressum, 114, 



Plate 40 

 Peridinians 18, 25, 113, 126, 



Plate 40 

 Periwinkles, 32, 46, 48, 202, 309, 



Plate 10 ; Spawning of, 51 

 Persian Gulf, 1, 221 

 Petricola pholadiformis, 149 

 Phalacroma rotundatum, 114, 



Plate 40 

 Phoca vitalina, 105 

 Pholadidea, 148 

 PAo/as, 36, 148, 155, 166, 191, 



Text fig. 41, Plate 55 

 Phosphates, 219, 246 

 Phosphorescence, 111, 117, 179, 



185 ; in crustaceans, 190 ; 



in fishes, 193 ; in jellyfish, 



188 ; in the piddock, 191 ; in 



protozoans, 187 ; Reasons 



for, 194 ; in seapens, 189 ; 



in squids, 192 ; in tunicates, 



192 ; in worms, 189 

 Phosphorescent organs, 190, 



Text fig. 40 

 Photoblepharon, 193 

 Photocorynus spiniceps, 98, 



Text fig. 17 

 Phronima, 120, Text fig. 26 

 Phyllopteryx eques, 100, Text fig. 



19 

 Physeter macrocephalus, 102, 



Text fig. 20 

 Phytoplankton, 245 

 Piddock, 36, 14, 155, 166, 191, 



Text fig. 41, Plate 55 

 Pigment cells, 181, Plate 68 

 Pilchard, 90 ; Egg of, Plate 29 

 " Pink shrimp," 317 

 Pinnipedia, 24 

 Pipe fishes, 62, 79 ; Feeding 



of, 209 

 Pisces, 23 

 Plaice, 90, 208 ; Age of, 326 ; 



Food of, 326: Plate 118; 



Marking of, 325, Plate 115 ; 



Migration of 84 ; Otoliths of, 



326, Plate 118 ; Research on, 



319, 321 

 Plaice eggs, distribution of, 



324, Text fig. 61 

 Plaice seine, Danish, 282 

 Plaice, Young, 324, Plate 112 ; 



in sandy pools, 324, Plates 



115, 116" 

 Plankton, 56, 58, 111, Plate 87 ; 



animals, 115 ; Distribution 



of, 123, Plate 47 ; larval 



stages of, Plate 91 ; plants, 



112 ; Seasonal changes of, 



243 ; Temporary, 244, Plate 87 

 Plant, largest known, 25 

 Plants, 24, 225 ; Boring, 151 



