268 
Gomontia (Fig. 50), 165, 166, 168, 
170, 260 
Gonimoblast, 205 
Goniotrichum, 248 
Gracilaria (Fig. 70), 224 
Grateloupiew, 238, 239 
Griffithsia, 237 
Grinnellia, 232 
Growth, 23 
Gymnogongrus, 216, 219 
Gyroporella, 154 
Heematocelis, 241 
Halicoryne, 148, 149, 151 
Halicystis (Plate III.) (Fig. 46), 
136, 157, 165 
Halidrys (Plate I.), 48, 49, 55 
Halimeda (Fig. 41), 137, 141, 144 
Halopithys, 235 
Halopleyma, 237 
Halopteris, 113, 114 
Halorhiza, 87, 89 
Halosphera (Fig. 55), 177, 179 
Halothrix, 95 
Halurus, 237 
Halymenia, 239 
Haploporella, 154 
Haplospora (Fig. 10), 66, 67, 70 
Farveyella, 211, 215, 219 
Helminthocladia, 209, 210 
Helminthocladiew, 207 
Helminthora, 207, 210 
ITennedya, 216 
FTerponema, 92 
Heterocystece, 252 
Hildbrandtia, 200 
Himanthalia (Fig. 4), 45, 48, 49, 
54, 55 
Homocystew, 255 
Hormogonia, 251 
Hormosira, 45, 47, 55 
ae (Fig. 27), 54, 105, 
1 
Hydrolapathum, 232 
Hyella (Fig. 88), 258, 261 
Hypnea, 224 
Lea, 175, 176 
SEAWEEDS 
Isthmoplea, 119 
Jania, 241, 244 
Kjellmania (Fig. 25), 102, 104 
Laminaria (Fig. 13), 79, 85 
Laminariacee, 75 
Landsburghia, 55 
Laurencia, 235 
Leathesia (Fig. 21), 91, 93 
Lejolisia, 237 
Lemanea, 200, 208 
Leptonema, 95 
Lessonia, 76, 77, 79, 81, 85 
Letterstedtia (Fig. 54), 174, 176 
Liagora, 209, 210 
Light, interception of by sea- 
water, 5 
Literature, 34 
Lithoderma, 109, 110, 111 
Lithophyllwm, 241, 244 
Lithothamnion (Fig. 83), 241, 243, 
244 
Litosiphon, 108 
Lomentaria (Plate VII.), 
225, 228, 229, 230 
Lyngbyew, 255 
224, 
Macrocystis (Figs, 16 and 17), 76, 
77, 79, 81, 85 
Marginaria, 55 
Martensia (Fig. 75), 230, 232 
Mastigocoleus, 257, 260 
Melobesia (Plate VIIT.), 241, 244, 
246 
Mesoglea, 93 
Microcladia, 238 
Microdictyon, 156, 163, 165 
Microspongium, 91 
Monospora, 237 
Monostroma, 174, 176 
Mounting-fluid, 30 
Munieria, 154 
Myelophycus, 108 
Myriactis, 93 
Myriocladia, 93 
Myriodesma, 48, 55 
Myrionema, 91,92, 93 
