INDEX 
Myriotrichia (Fig 23), 95, 117 
Naccaria (Plate V.) (Fig. 65), 215 
Nemalion (Plate V.), 209, 210 
Vemalionacew, 207 
aVemastomec, 238 
Nematophycus, 143 
Neomeris (Fig. 45), 152, 155 
Nereia, 86, 87 
Nereocystis, 77, 79, 85 
Nitophylium, 202, 230, 232 
Node, 190 
Nodule, 190 
Notheia (Fig. 5), 42, 47, 49, 51 
Nostoc, 254 
Nostocacee, 251 
Nostocew, 252 
Odonthalia, 235 
Ooblastema filament (Fig. 82), 204 
Oogonium (Figs. 2 and 34), 49, 58 
61, 128 
Oscillaria, 249 
Oscillariew, 255 
Padina (Plate II.), 61, 63 
Palmophyllum, 180, 181 
Pelagic Alge, 17 
Pelvetia (Plate I.), 51, 55, 68 
Penacillus (Fig. 38), 137, 138, 139 
140, 144, 161 
Peridiniee, 181 
Perithalia, 86, 87 
Perizonium, 194 
Petrocelis, 241 
Petrospongium, 92, 93 
Peyssonellia, 241 
Phacelocarpus (Fig. 70), 224 
Pheophila, 170, 172, 173 
Pheophycee, 39 
Phleospora, 102, 104 
Phloiocaulon, 115 
Phormidium, 257 
Phycocelis, 117 
Phycocyanine, 4 
Phycoerythrine, 4 
Phycopheine, 4 
269 
Phycoxanthine, 4 
Phyllitis, 108 
Phyllophora (Plate VI.), 216, 219, 
220 
Phyllospora, 47, 55 
Pinnuaria (Fig. 59) 
Planktoniella (Fig. 60) 
Plectonema, 255, 257 
Pleonosporium, 237 
Pleurocapsa, 179 
Pleurococcacee, 179 
Pleurocladia, 115, 116 
Pleurostichidium, 235 
Plocamium (Fig. 72), 224, 230 
Plumaria, 237 
Pollinoid (Fig. 62a), 63, 202 
Polycystis, 261 
Polyides (Plate VIII.) (Fig. 82), 
239, 240 
Polyphysa, 145, 147 
Polysiphonia (Plate VIL) (Fig. 
77), 233, 235 
Polytrypa, 154 
Porphyra (Plate V.), 247, 248 
Porphyroglossum, 215 
Postelsia (Figs. 15 and 17), 77, 79, 
81, 85 
Prasiola, 180, 181 
Preservation in spirits, 30 
Pringsheimia, 174, 176 
Protococcacew, 177 
Pterocladia, 215 
Pterosiphonia, 235 
Pterygophora, 78, 85 
Ptilonia, 233 
Ptilophora, 215 
Ptilopogon, 115 
Ptilota, 237 
Ptilothamnion, 237 
Punctaria, 105, 108 
Pycnophycus, 55 
Pylaiella, 119 
Pyrocystis (Fig. 57), 184, 185 
Ralfsia, 109, 110 
Ralfsiacee, 108 
Range in depth, 5 
Raphe, 190 
