270 
Reproduction, 25 
Rhabdoliths, 186, 187 
Rhabdonema, 195 
Rhabdonia, 221 
Rhabdospheres (Fig. 584), 185, 
186, 189 
Rhipilia, 137 
Rhipocephalus (Fig. 39), 141 
Rhizoclonium, 166, 169 
Rhizophyllidee, 239 
Rhodochorton, 238 
Rhododermis, 241 
Rhodomela, 235 
Rhodomelee, 233 
Rhodophycee, 200 
Rhodophyllidee, 220 
Rhodophyllis, 2?1 
Rhodymenia (Plate VII.), 224, 
230 
Rhodymeniacee, 222 
Rhodymenier, 224 
Rivularia (Fig. 86) 
Rivulariew, 252 
Saccorhiza (Fig. 12), 54, 76, 81, 84, 
85 
Salinity, influence of, 9 
Sarcophycus (Fig. 6), 48, 49, 51, 
55, 59 
Sargassum, 43, 48, 55 
Scaphospora (Fig. 10), 66, 67, 68 
Schizymenia, 239 
Schmitziella, 244 
Scinaia (Plate V.) (Fig. 63), 210, 
213 
Scytonemine, 250 
Scytosiphon, 84, 108 
Scytothalia, 55 
Seytothamnus, 54, 98, 99 
Siphonocladus, 156, 159, 163, 165 
Strosiphoniew, 252 
Solieria, 221 
Sorocarpus, 117, 119 
Spatoglossum, 61 
Spermatochnus (Fig. 19), 87 
Spermothamnion, 237 ~- 
Sphacelaria (Fig. 28), 118, 114, 
115 
SEAWEEDS 
Sphacelariacee, 111 
Sphacella, 115 
Spherococcee, 223 
Spherococcus, 224 
Sphondylothamnion, 237 
Splachnidiacee, 70 
Splachnidium (Fig. 11), 70, 81, 84, 
107 
Spongocladia, 161, 163 
Sporochnacee, 86 
Sporochnus (Plate II.), 86, 87 
Spyridia, 238 
Squamariee, 240 
Stenogramme (Fig. 66), 216, 217, 
219 
Stichidia, 206 
Stictyosiphon (Fig. 26), 104 
Stilophora (Fig. 20), 87, 89 
Stechospermum, 61 
Streblonema, 116, 119 
Striaria, 102, 104 
Striariacee, 101 
Struvea (Fig. 48), 161, 163, 165 
Stypocaulon, 113, 114 
Suhria, 215 
Suture, 190 
Sykidion, 178, 179 
Taonia, 60, 61, 63 
Temperature, influence of, 7 
Tetraspore (Fig. 61), 64, 205 
Thalassiophyllum, 76, 79 
Thamnocarpus, 238 
Thysanocladia, 221 
Tilopteridacee, 66 
Tilopteris, 66, 67, 68, 69 
Tissues, 24 
Trichodesmium, 257 
Trichogyne (Fig. 628), 203 
Trichome, 251 
Triploporella, 154 
Tuomeya, 200 
Turbinaria (Fig. 7), 44, 47, 48, 54, 
55 
Udotea (Fig. 40), 137, 138, 141, 
143, 144 
Udoteacew, 137 
