446 



INDEX 



Histriophoca, 405 

 Holothuroidea. See Trepangs 

 Holtenia, 236 

 Homolodromiidae, 264 

 Homothermic layer of air, 20 

 Hormogonia, 134 

 Hormosira, 143, 149 

 Horse latitudes, 7 

 Humpback whale, 384, 394396 

 Hurricane, 10 

 Hyalea, 185 

 Hyalincecia, 241, 250 

 Hydroids, 168-171, 235 



preservation, 369 

 Hydromedusae, 168, 169 



preservation, 369-371 

 Hydrometer, 52, 53 

 Hydrophidae, 409, 410 

 Hydrus, 79, 410 

 Hyperoodon, 398, 389 



Ianthina, 182 



Ice-borne material, 209, 211, 212 



Inia, 402 



Insects, 184 



Insulating water-bottle, 37-42 



Iridaea, 147 



Islands, classification, 82 



Isobar, a line drawn through 



points of similar atmospheric 



pressure 

 Isobaric charts, 5 



gradients, 6, 10, 11 

 Isohaline, a line drawn through 



points of similar saltness 

 Isohalines, 30 

 Isopoda of bottom, 244 

 of plankton, 180 

 preservation, 379 

 Isotherm, a line drawn through 



points of similar temperature 

 Isothermal layer of air, 20 



Jars for storage, 364, 365 

 Jelly-fish, 168-174 

 preservation, 369-375 



Kelp. See Laminarias 

 Kelvin's sounder, 28 

 Killer whale, 399 

 Killing animals, methods, 345 

 Kites, meteorological, 20, 21 

 Kofoid's water-bottle, 116 



Kogia, 398 



Krakatoa, dust from, 21 

 Kriimmel on Sargassum, 146, 

 M7 



Labels, 366, 367, 415, 418 

 Laboratory, yacht's, 283-288 

 Lagena, 81 

 Lagenorhynchus, 401 

 Lagoon, 87 et seq., 100 et seq. 

 Lamellibranchia, bottom, 248 



plankton, 182 



preservation, 381 

 Laminarias, 131, 139, 142, 158, 



161 

 Laminarian zone, 231, 232 

 Land breeze, 8 



study of, 66-69 

 Laurencia, 152 

 Le Blanc sounder, 277, 279 

 Lepadogaster, 318 

 Leptonyx, 406 

 Leptopenus, 237 

 Lessonia, 142, 144 

 Light, effect on plants, 128, 129, 

 234 



penetration of , 129, 228, 234 

 Lines. See Fishing 

 Line squall, 9 

 Lithodomus, 78 

 Lithophyllum, 151, 160 

 Lithothamnium, 73, 94, 95, 127, 



151, 152, 160, 257 

 Littoral deposits, 213 



region, 128, 129 



zone, 231, 232. See also 

 Shore 

 Lobodon, 406 

 Lobospira, 143 

 Lobsters, 245 

 Logs, 415-419 

 Lohmann's pumping method, 



115 

 Loligo, 248 

 Long lines, 330-333 

 Lucas sounding machine, 203, 



277, 278, 281, 282 

 Lucifer, 183 



Luminosity of animals, 262, 264 

 Lyngbya, 134 



Microcystis, 140, 142 

 Macrorhinus, 406 



