NATURE ADRIFT 



North Atlantic Drift, io8, 109 

 nutrients, 110-112, 122, 138, 167-170 

 Nyblad, Margaret, 3 

 Nyctipliancs, 74 

 nylon, for nets, 27 



Obelia, 142, pi. XII, fig. 14 



oblique hauls, 18 



octopus, 62, 153 



oikoplast, 76 



Oikoplcura, 76, 98, 123, 129, pi. XIX, 



%• 23 

 oil in copepods, 160 

 oil in diatoms, 34, 160 

 oil in fish eggs, 97 

 ooze — -diatomaceous, 34 

 ooze — globigerina, 45 

 ooze — radiolarian, 45 

 Oscillatoria, 39 

 Oslo fjord, 48 

 Ostracoda, 65 

 otocyst, 74 

 Owcuia, pi. XXIII 



Paliiiiinis (spiny lobster), 88, 144 

 parasitic copepods, 68 

 parasitic dinoflagellates, 41 

 parasitic isopods, 72 

 paravanes, 16, 21, fig. 3 

 Parcuchacta harbata, 141, T44 

 Pasiphaca, 74 

 patchiness, 119 

 Pavlova gyraiis, 31 

 pea crab, pi. XXV, fig. 22 

 pearl jelly {Pelaq^ia), 54, fig. 16 

 Pdagotfinria, 76 

 Pelecypoda, 87 

 Penaeidae, 88 

 PcridiniiiDi, 123, pi. IX 

 periwinkle larvae, fig. 24 

 Phacocystis, 39, pi. IX 

 Phacocystis and herring, 39 

 pharmaceutical value, 166 

 pheromones, 154 

 phorozoids, 80, fig. 23 

 Pho Wilis, 85, pi. XXIII 

 phosphorescence, 39, 80, 154-155 

 photic depth, 169 

 photography (underwater), 25-26 

 photophores, 63, 106, 154-155 

 photosynthesis, 28 

 Phroiiiiiia, 79, pi. XIX 

 phyllosoma, 88, 144, fig. 21 



Physalia, 54, pi. II, fig. 17 

 Physoplwra, 57, 144, fig. 17 

 phytoplankton, 21-42, 79, 98, no, 126, 



133, Frontispiece, pi. VII 

 pike fishery, 136 

 pilchard, 130, 133 

 pilchard eggs, 98, pi. XXIII 

 pilidium, 85, fig. 24 

 pine trees and cod, 130 

 pink icebergs, 40 

 pipes, choking of, 116 

 plaice, loi, 126, 130, pi. XXX 

 plaice eggs, 98 

 plankton (definition), 5 

 Plankton Indicator ('Hardy'), 19, 131, 



figs. 5, 34 

 planula, 85 



Plciirobrachia, 57, 129, pi. XVI, fig. 17 

 Plcuromainnia abdoiiiiiialis, 141 

 Plcurosigma angulatiiui, 37 

 plutei, 91, pi. XXVII, fig. 26 

 Podon, 65, 142, pi. XVII, fig. 19 

 polychaetes, 85 

 polychaete larvae, 85, fig. 25 

 Polygordiiis, pi. XXII 

 Pope Innocent III, 70 

 Portuguese Man o' War, 54, pi. II, fig. 17 

 prawns, 88 



preservatives, 26-27, 164 

 pressure, effect of, 118 

 Princess Alice, 7 

 proboscis worms, 85 

 proteins, 122, 160, 165 

 Protozoa, 45, fig. 12 

 pteropods, 62 

 pumps, 23 

 Pyrosoiiia, 80, 154 

 Pyrotcuthis, pi. XV 



Radar (and bioluminescence), 155 



radioactive isotopes, 24 



Radiolaria, 45, fig. 12 



radiolarian ooze, 45 



Raitt, D. F. S., 3 



raphe, 34, fig. 9 



rare fish records, 152 



regeneration of nutrients, 122, 125, 169 



'red gut', 131 



Red Sea^ 40 



'red tides', 40, 138, 171 



reptiles, 43 



resting spores, 31 



Rhincalaiiiis, 144 



176 



