INDEX

Abdomen of Lobster, 6 Abyssal fauna of lakes, 185 Acanthephyridæ, 268 Acorn-shells, 41 Æga: in Sponges, 210; parasitic on fish, 219 Æger, 267 Æglea, 181 Air-breathing Crabs, 188 Albunea, 102 Alcock, A.: on habits of Ocypode, 105; on temperature of sea, 120; on eyes of deep-sea Crustacea, 124; on colour in deep-sea Crustacea, 127; on luminosity of deep-sea Crustacea, 125, 126; on eggs of deep-sea Prawn, 130; on Nephrops, 132; on habits of Cœnobita, 194, 195 Allen, E. J., on Mackerel fishery, 251 Alpheidæ, 211 American Lobster, 32 Amphibious Crustacea, 104, 188 Amphipoda, 52; seashore, 95, 107; plankton, 145; terrestrial, 189; fresh-water, 172; in Sponges, 210; on Jellyfishes, 212; and Hermit Crabs, 215; parasitic, 223; wood-boring, 255 Amphithoë, 95 Anaspides, structure and fossil allies, 264 Andrews, C. W.: on Land Crabs, 190; on habits of Cœnobita, 195; on habits of Birgus, 197, 198 Anomalocera, 150 Anomura, 60: fresh-water, 181 Anostraca, 36: habits, 162, 164 Antennæ of Lobster, 8, 14: use in respiration in Corystes, 100; in Albunea, 102 Antennule of Lobster, 8, 14 Ants, Woodlice living with, 205 Apseudes, 50 Apus, 36: habitats, 161; occurrence in Britain, 162; habits, 163; hæmoglobin in, 165; fossil allies of, 260 Appendages of Lobster, 8: of Trilobites, 259 Aratus, 189 Argulus, 41 Aristotle on Shrimp living with Mollusc, 218 Armadillidium, 203 Artemia: larvæ of, 81; habitat, 164 Arthropoda, 2: classification, 204 Asellus, 172: destroying fishing nets, 253 Astacidæ, 176 Astacoides, 178 Astacopsis, 177: used for food, 243 Astacura, 60 Astacus: habits, 174; young, 76; distribution, 177; used for food, 241 Asymmetry of Lobster, 29 Atyidæ, 179: used for food, 248 Autotomy, 113: in Lobster, 30 Baikal, Lake, 182 Balanus, 42: larvæ, 83; habits, 114; used for food, 237; cultivated for manure, 250 Barnacles, 41: development, 83; seashore, 114; of high seas, 155; on Whales, Turtles, and Crabs, 209; parasitic, on fish, 235; used for food, 237; cultivated for manure, 250; fossil, 261 Bathynomus, 131 Beach-fleas, 107 Bell, T., on development of Land Crabs, 193 "Berry," Lobster in, 28 Bipolarity, 132 Birgus, 94: habits and structure, 195; breeding habits, 199. See also Robber Crab Bloodvessels of Lobster, 17 Blue Crab, 249 Bopyroides, 221 Bopyrus, 221 Borradaile, L. A.: on habits of Remipes, 102; on Huenia, 110; on larvæ of Robber Crab, 199 Bouvier, E. L., on Dromiacea, 134 Brachygnatha, 63 Brachyrhyncha, 64: fossil, 270 Brachyura, 62: fossil, 269 Brain of Lobster, 20 Branchiopoda, 35: larvæ, 80; habitats, 161; fossil, 260 Branchiostegite, 18 Branchipus, 165 Branchiura, 41 Brine Shrimp, 164: larvæ, 81 Brood-pouch of Peracarida, 46 Brown Shrimp, 244 Browne, F. Balfour, on Apus in Scotland, 162 Browne, Patrick, on Mountain Crab, 193 Bullen, G. E., on food of Mackerel, 251 Bythotrephes, 168 Caligidæ, 225 Caligus, 225 Callianassa, 103 Callinectes, 249 Calocalanus, 149 Cambaroides, 177 Cambarus: distribution, 177; habits, 178; blind species, 185; used for food, 243 Cancer: used for food, 248; fossil, 270. See also Edible Crab Cancrinus, 269 Canthocamptus, 170: resting stage, 171 Caprella, 54 Caprellidæ, 55: habits, 109 Carapace of Lobster, 6, 9 Carcinus: larval stages, 68; habits, 107. See also Shore Crab Cardisoma, 191 Caridea, 59: zoëa of, 73; fossil, 268 Caridina, 248 Carp-lice, 41 Caspian Sea, 182 Caudal fork, 40 Cephalothorax of Lobster, 8 Ceratiocaris, 262 Chalimus, 225 Chela of Lobster, 12 Cheliped of Lobster, 8 Chelonobia, 155, 209 Chelura, 255 Cheraps, 177 Chilton, C., on Woodlice in New Zealand, 206 Chirocephalus, 35, 161 Chitin, 15 Chondracanthus, 228 Chromatophores, 31, 110 Chun, C., on eyes of plankton Crustacea, 154 Chydorus, 165 Cirolana, 218 Cirripedia, 41: development, 82; on Whales, 209; parasitic, 231; fossil, 261. See also Barnacles Cladocera, 37: development, 80; habits, 165; in plankton of lakes, 168; absence from Tanganyika, 184 Claspers of Chirocephalus, 35 Classification of Crustacea, table, 34: of Decapoda, table, 58 Close time for Lobsters, 239 Coconut Crab. See Robber Crab Cocoons of Copepoda, 171 Cœnobita: habits, 194; respiration, 195 Cœnobitidæ, 61: habits, 194 Colour of Lobster, 31: deep-sea Crustacea, 127; plankton Crustacea, 150; Branchiopoda, 165; subterranean Crustacea, 187 Colour-change, 110 Columbus and Gulf-weed Crab, 155 Commensalism, 207 Conchoderma, 209 Conchœcia, 144 Conchostraca, 37: habits, 163 Convergent evolution, 205 Copepoda, 40: development, 82; of open sea, 140; plankton, 149; luminosity, 150; eyes, 152; of fresh water, 170; of Tanganyika, 184; and Hermit Crabs, 215; parasitic, 224; as food of Mackerel, 250 Copilia, 152 Coral of Lobster, 27 Corals, Crustacea on, 210 Coronula, 155, 209 Corycæidæ, 152 Corystes, 99 Crabs: true, 62; sand-burrowing, 99; of fresh water, 179; of Tanganyika, 183; on Corals, 211; carrying Sea-anemones, 215; living with Molluscs, 217; living in Sea-urchin, 218; Isopods parasitic on, 223; Rhizocephala parasitic on, 231; used for food, 248; fossil, 269. See also Shore Crab, Edible Crab, etc. Crangon, 59: habits, 97; fishery, 244 Crawfish, Sea-, 59 Crayfish: young of, 76; habits, 174; distribution, 176; terrestrial, 178, 189; blind, in caves, 185; in British Isles, 241; used for food, 241; disease of, 243 Cumacea, 48: habits, 98; of deep sea, 129; of plankton, 141 Cunningham, J. T., on development of Land Crabs, 192 Cup Shrimps, 245 Cyamidæ, 56: habits, 224 Cyclops, 40: nauplius, 82; habits, 170; resting stage, 171; as host of Guinea-worm, 252 Cymothoa, 220 Cymothoidæ, habits, 218 Cymothoinæ, habits, 220 Cypris, 38: reproduction, 172 Cypris stage of Barnacles, 84: of Sacculina, 233 Cystisoma, 145 Cythereis, 38 Daphnia, 38: development, 81; habits, 165; in plankton of lakes, 168 Darwin, C.: on fresh-water fauna, 157, 159; on habits of Birgus, 198, 199; on Barnacles used for food, 237 Decapoda, 57: fossil, 267 Deep-water Prawn, 246 Delage, Y., on development of Sacculina, 232 Development of Lobster, 28: of Crayfish, 77; of River Crab, 78; of Peracarida, 78; of Woodlice, 79; of Opossum Shrimp, 79; of Cladocera, 80; of Ostracoda, 81; of Copepoda, 82; of fresh-water Crustacea, 160; of Epicaridea, 223; of parasitic Copepoda, 225, 227, 230; of Rhizocephala, 232 Diaptomus, 170 Diastylis, 49 Diatoms, 139: relation to Mackerel fishery, 251 Dichelaspis, 209 Digestive gland, 17 Dispersal of fresh-water Crustacea, 159: of Crayfishes, 174 Distribution of Woodlice, 206 Doflein, F., on luminosity in marine animals, 126 Dogfish, Barnacle parasitic on, 235 Dorippe, 95 Dracunculus, 252 Dromia, 63: habits, 96; and Sponge, 215 Dromiacea, 63: of deep Sea, 128, 134 Dublin Prawn, 33: fishery, 240 Ebalia, 63: protective resemblance, 109 Écrevisse, 242 Edelkrebs, 242 Edible Crab, 64, 248 Eggs of Lobster, 27: of deep-sea Crustacea, 130; of fresh water Branchiopoda, 161 Endopodite, 11 Engæus: distribution, 177; habits, 179, 189 Entoniscidæ, 223 Ephippium of Cladocera, 167 Epicaridea, habits, 221 Epiplankton, 143 Epipodite, 11 Epistome, 62 Erichthus larva, fossil, 266 Eryon, 135 Eryonidea, 60: eye-stalks of, 122; luminosity, 126; eggs of, 131; fossil and living species, 133, 268 Estheria, 36: habitats, 161 Eucarida, 56 Eucopepoda, 41 Eumalacostraca, 45 Eupagurus, 91: commensals, 213 Euphausiacea, 56: larvæ, 76; of deep sea, 124, 125; luminous organs, 125, 151; eyes, 153; fossil, 263 European Lobster, 32 Eurydice, 219 Evolution, 256 Excretory organs, 19 Exopodite, 10 Exoskeleton, 15 Eyes of Lobster, 20: of Cyclops, 40; of deep-sea Crustacea, 121; of plankton Crustacea, 151; of Bythotrephes, 169; degeneration in subterranean Crustacea, 186 Eye-stalk of Lobster, 14 Fairy Shrimp, 35: habitats, 161 Filaria, 252 Fiddler Crab: habits, 106; colour-change, 111 Fish: attacked by Isopods, 219; Crustacea as food of, 250 Fish-lice, 224 Flagellum, 14 Foraminifera, 118 Fossil Crustacea, 256 Galathea, 130 Galatheidea, 60 Galls on Corals, 211 Gamble, F. W., on colour-changes, 111 Gammaridea, eyes of, 154 Gammarus, 53: distribution, 172; in Lake Baikal, 183 Ganglia of Lobster, 20 Garstang, W., on habits of Masked Crab, 100 Gastric Mill of Lobster, 17 Geographical distribution of Lobsters, 32: of Crayfishes, 174 Gecarcinidæ, 190 Gecarcinus, 190: supposed metamorphosis, 192 Gecarcoidea, 190 Gelasimus, 188: habits, 106; colour-changes, 111 Generative organs of Lobster, 27 Giant Crab, 64 Giesbrecht on luminosity of Copepoda, 150 Gill chamber of Lobster, 18 Gills of Lobster, 12, 18: of Mysidacea, 48 Globigerina ooze, 119 Glomeris, a Millipede, 3, 203 Glyphæidæ, 268 Gnathobases of Trilobites, 259 Gnathophausia, 48 Goose Barnacle, 42 Gosse, P. H., on Porcelain Crabs, 115 Grapsidæ, 180 Grapsus, 107 Green gland, 19 Gribble, 253 Guilding, L., on development of Land Crabs, 193 Guinea-worm, 252 Gulf-weed Crab, 155: on Turtles, 208 Habitations of shore Crustacea, 95 Hæmocera, 229 Hæmoglobin in Branchiopoda, 165 Hairs of Lobster, 22 Hall. See Spencer and Hall Halocypridæ, 141, 144: luminosity, 151 Hapalocarcinus, 211 Head of Lobster, 7 Hearing, sense of, in Lobster, 22 Heart of Lobster, 17 Hermaphroditism of Cirripedia, 43: in Isopoda, 52; of Cymothoinæ, 221; of Epicaridea, 223; of Rhizocephala, 231 Hermit Crabs, 61: of seashore, 91; of deep sea, 124, 136; terrestrial, 194; commensals, 213; Isopods parasitic on, 221 Heterocarpus, 125 Hickson, S. J., on Caridina, 248 Hippa, 102 Hippidea, 62: habits, 102 Hippolyte, colour-changes, 111 Holopedium, 170 Homaridæ, 33 Homarus, 32: fishery, 238 Homolodromiidæ, 134: fossil allies, 269 Homologous organs, 10 Hoplocarida, 64 Huenia, 109 Huxley, T. H.: on Barnacles, 115: on distribution of Crayfishes, 176 Hyas, masking habits, 96 Hyperia, 142: on Jellyfishes, 212 Hyperiidea, 141: eyes, 154 Hypoplankton, 143 Hypostome, 259 Inachus infected with Sacculina, 235 Intestine of Lobster, 16 Isopoda, 51: deep-sea, 131; fresh-water, 172; subterranean, 186; land, 199; in Sponges, 210; parasitic, 218; wood-boring, 253; fossil, 266 Jasus, 241 Jellyfishes, Amphipods on, 212 Keeble, F., on colour-changes, 111 Kidney, 19 Koonunga, 264 Land Crabs, 189: injuring crops, 253 Land Hermit Crabs, 194 Land-hoppers, 189 Langouste, 241 Lankester, E. Ray, on hæmoglobin in Branchiopoda, 165 Larvæ of Lobster, 28: of Norway Lobster, 71; of Stomatopoda, 80; of Brine Shrimp, 81; of Land Crabs, 191; of Robber Crab, 199; fossil, of Stomatopoda, 266 Larval stages, 66: significance of, 85 Latreillia, 128 Leach, W. E., on the Gribble, 254 Leander, 59, 179: Isopod parasitic on, 221; used for food, 245 Legs of Lobster, 8, 12 Lepas, 42: habitat, 155; nauplius, 148 Lepeophthirus, 225 Leptodora, 169 Leptostraca, 45 Lernæa, 226 Leucosiidæ, 109 Ligia, structure and habits, 200 Limnoria, 254 Linuparus, 269 Lithodes, 62, 94 Lithodidæ, 61 Liver of Lobster, 17 Lobsters: deep-sea, 121; fishery, 238 Lovén, S., on relict Crustacea, 181 Luminosity of deep-sea Crustacea, 125: of plankton Crustacea, 150 Lynceidæ, 165 Mackerel feeding on plankton, 250 Macropodia, masking habits, 97 Maia, masking habits, 96 Malacostraca, 43: fossil, 261 Mammoth Cave, Crayfish of, 185 Mandible of Lobster, 8, 14 Masked Crab, 99 Masking of Crabs, 96, 215 Maxilla of Lobster, 8: of Argulus, 41 Maxillipeds of Lobster, 8, 11 Maxillula of Lobster, 8 Medusæ, Amphipods on, 212 Megalopa of Shore Crab, 70 Meganyctiphanes, 56, 151 Melia, 215 Mesidotea, 181 Mesoplankton, 143 Messmates, 208 Metamorphosis of Lobster, 28: of Land Crabs, 191 Metanauplius of Penæus, 75 Mimicry, 204 Mimonectes, 145 Mitsukuri, K., on cultivation of Barnacles, 250 Mole Crabs, 102 Monstrillidæ, 230 Moulting of Lobster, 15: of Woodlice, 206 Mountain Shrimps, 181: structure and fossil allies, 264 Mouth-frame of Crabs, 62 Müller, Fritz: on larval stages of Penæus, 73; on habits of Aratus, 189 Müller, O. F., on Nauplius, 82 Munida, larva of, 71 Munidopsis: eyes, 123; eggs, 130 Murray River Lobster, 243 Mussels and Pea Crab, 217 Myodocopa, 39 Mysidacea, 46: development, 79; luminosity, 127; eyes, 153; and Hermit Crabs, 215; fossil, 263 Mysis, 47: in lakes, 181, 182 Natantia, 58; used for food, 243 Nauplius of Penæus, 73; of Crayfish, 79; of Opossum Shrimp, 79; of Branchiopoda, 80; of Cyclops, 82; of Ostracoda, 82; of Barnacles, 83; of Lepas, 148; of Leptodora, 170; of Sacculina, 233; eye, 40 Nebalia, 44: fossil allies, 261 Nebaliacea, 44 Necton, 138 Nematocarcinidæ, 128 Nephrops, 33: larva, 71; distribution, 132; fishery, 240 Nephropsidea, 33, 60 Nephropsis, 121 Neptunus, 156: used for food, 249 Neritic plankton, 141 Nervous system of Lobster, 20 Niphargus, 184 Northern Crayfishes, 176 Norway Lobster, 33: larva, 71; fishery, 240 Norwegian Prawn, 246 Notostraca, 36: habits, 162 Oceanic plankton, 141 Octopus preying on Crustacea, 89 Ocypode, 188: habits, 104; carnivorous, 195 Olfactory filaments of Lobster, 25 Oniscus, 51: Structure and habits, 201 Operculata, 43 Opossum Shrimps, 46: development of, 79 Orchestia, 107 Orientation, organs of, 24 Ostracoda, 38: development, 81; luminosity, 127, 151; plankton, 144; fresh-water, 172; of Tanganyika, 184; fossil, 261 Ovary of Lobster, 27 Oxyrhyncha, 64: masking habits, 96; fossil, 270 Oxystomata, 63: habits, 101; protective resemblance, 109; deep-sea, 128; fossil, 269 Oxyuropoda, 266 Oyster Crab, 249 Oysters and Pea Crab, 217 Paguridea, 61 Paguropsis and Sea-anemones, 214 Palæmon, 179: used for food, 248 Palæmonetes, 174 Palinura, 59 Palinuridæ, 241: fossil, 269 Palinurus, larva of, 72: fishery, 240 Palp, 14 Pandalus, 59, 137: used for food, 245 Panulirus, 241 Paracyamus, 55 Paranaspides, 264 Paranephrops, 177 Parapagurus, 124: and Sea-anemones, 213 Parasitism, 208 Parastacidæ, 176 Parastacus, 178 Partan, 248 Parthenogenesis, 163: of Cladocera, 166; of Ostracoda, 172 Pea Crab, 217 Pedunculata, 43 Peltogaster, 232 Penæidea, 59: fossil, 267 Penæus, 59: larvæ, 73; used for food, 247; fossil, 268 Peracarida, 46: development, 78 Pericardium, 17 Peripatus, tracheæ of, 204 Peter's stone, 220 Philomedes, 38 Phosphorescence. See Luminosity Photophores of Euphausiacea, 125 Phreatoicidea, 173 Phronima, 154 Phronimidæ, eyes of, 154 Phtisica, 54 Phyllocarida, 261 Phyllosoma, 149: of Spiny Lobster, 72 Phylogeny, 205, 256 Pill Millipede, 203 Pink Shrimp, 137, 245 Pinnaxodes, 218 Pinnotheres, 217: used for food, 249 Planes, 155 Plankton, 139: of fresh water, 160; of lakes, 168, 170; relation to fisheries, 250 Platyarthrus, 205 Platycuma, 129 Platymaia, 130 Platytelphusa, 184 Pleuron, 9 Podocopa, 39 Podocrates, 269 Pollicipes used for food, 237: fossil, 261 Polycheles, 133 Pontonia, 218 Pontoporeia, 181 Porcelain Crab: zoëa of, 70: autotomy, 114; feeding, 115; and Hermit Crabs, 215 Porcellana: zoëa of, 70: autotomy, 114; feeding, 116 Porcellanidæ, 60 Porcellio, 51: structure and habits, 202; distribution, 206 Portunidæ: swimming, 90: sand-burrowing, 99; used for food, 249 Potamobiidæ, 176 Potamobius, 174 Potamon, 180: young of, 78 Præanaspides, 265 Prawns, 58: luminosity of, 127; of deep sea, 136; of fresh water, 174, 179; of Tanganyika, 183; blind, in caves, 185; in Sponges, 210; Isopods parasitic on, 221; Common, 245; used for food, 245; deep-water, 247; fossil, 268 Prosoponidæ, 135, 269 Protandrous hermaphroditism, 221 Protective resemblance, 108 Protocarcinus, 269 Protocaris, 260 Protopodite, 10 Protozoëa of Penæus, 75 Psathyrocaris, 130 Pseudothelphusa, 193 Pseudo-tracheæ, 202 Pygidium, 259 Pygocephalus, 263 Pylocheles, 94 Pylochelidæ of deep sea, 136 Recapitulation, theory of, 86 Red-clawed Crayfish, 242 Regeneration in Lobster, 30 Relict faunas, 182 Remipes, 102 Reproduction of Cladocera, 166: of Leptodora, 169; of Cymothoinæ, 220 Reptantia, 59 Respiration in sand-burrowing Crabs, 99: in amphibious Crabs, 106; in Land Crabs, 193; in Cœnobita, 195; in Birgus, 196; in Land Isopods, 201, 202, 203 Resting eggs of Cladocera, 166: of Copepoda, 170 Resting stage of Copepoda, 171 Reversal of asymmetry in Lobster, 30 Rhizocephala, 43: larvæ, 84; structure and development, 231 River Crabs: young of, 78: habits and distribution, 180; development of, 193 River Prawns, 179: used for food, 248 Robber Crab, 61, 94: habits and structure, 195; breeding, 199 Robertson, David, on habits of Crabs, 97 Rock Lobster. See Spiny Lobster Rostrum of Lobster, 6 Sacculina, 231 Salt lakes, Branchiopoda of, 165 Sand-burrowing Crustacea, 97 Sand-hoppers, 52: habits, 107, 189 Sapphirina, 150 Sargasso Sea, 155 Scampo, 240 Scapellum, fossil, 261 Scaphognathite, 19 Schizopod Stage of Lobster, 71: of Penæus, 75 Scylla, 249 Scyllaridæ, fossil, 269 Scyllaridea, 59: Phyllosoma larvæ, 149; fossil, 268 Scyllarus, fossil, 269 Sea-slater, 200 Sea-anemones: and Hermit Crabs, 213: carried by Crab, 215 Sea-crawfish. See Spiny Lobster Sea-urchin, Crab living in, 218 Sedentary Crustacea, 114 Self-mutilation in Lobster, 30 Senses of Lobster, 25 Sergestes, zoëa of, 75, 148 Serial homology, 10 Sesarma, habits, 180, 189 Sessile Barnacles, 43 Sexes of Lobster, 26 Sexual characters of Crabs infected with Sacculina, 235 Sharks, Barnacle parasitic on, 235 Shore Crab, 64: larval stages, 68; habits, 107, 188; infested by Sacculina, 231; used for food, 249 Shrimps, 58: fresh-water, 53, 172; Common, habits of, 97; protective resemblance, 108; living with Mollusc, 218; fishery, 244. See also Brown Shrimp, Pink Shrimp, etc. Sight, sense of, in Lobster, 21 Skeleton Shrimps, 109 Slaters, 51: Sea-, 200 Sloane, H., on Gulf-weed Crab, 155 Smell, sense of, in Lobster, 24 Smith, G.: on terrestrial Amphipoda, 189: on development of Sacculina, 233 Smith, S. I., on habits of Ocypode, 105 Somites of Lobster, 6, 8 Southern Crayfishes, 176 Spencer and Hall on Australian Branchiopoda, 161, 163 Sperm-receptacle of Lobster, 27 Spider Crabs, 64: masking habits, 96, 215; deep-sea, 128 Spiny Lobster, 59: larva of, 72; fishery, 240 Spirontocaris, Isopod parasitic on, 221 Sponge Crab, 95 Sponges, Crustacea in, 210 Spongicola, 210 Squilla, 64: larva of, 80; fossil, 266 Stalked Barnacles, 43 Statocyst of Lobster, 24: of Mysidacea, 47 Statolith, 47 Stebbing, T. R. R.: on Land Crabs, 190: on habits of Cirolana, 219 Steinkrebs, 242 Stenopidea, 59: fossil, 267 Stenorhynchus, 97 Sternum, 9 Stevenson, R., on the Gribble, 254 Stomach of Lobster, 16 Stone Crab, 61, 94 Stomatopoda, 64: larvæ, 80; habits, 104; fossil, 266 Stridulating organ of Ocypode, 105 Subterranean Crustacea, 184 Swimmerets of Lobster, 6, 10 Swimming Crabs, 90: sand-burrowing, 99; used for food, 249 Symbiosis, 207 Syncarida, 45, 181: fossil, 264 Tail-fan of Lobster, 6 Talitridæ, 107 Talitrus: habits, 107: terrestrial Species, 189 Tanaidacea, 50 Tanganyika, Lake, Crustacea of, 183 Taste, sense of, in Lobster, 25 Telphusa, 180 Telson of Lobster, 6 Tergum, 9 Testis of Lobster, 27 Thalassinidea, 61: habits, 103 Thaumastocheles, 130, 132 Thompson, J. Vaughan: discovery of metamorphoses of Crustacea, 67: on larvæ of Cirripedia, 83; on development of Sacculina, 232 Thoracica, 43 Thorax of Lobster, 7 Thread-worms, 252 Touch, sense of, in Lobster, 22 Tracheæ, 204 Tracheæ, pseudo-, 202 Trapeziidæ, 211 Triarthrus, 258 Trilobites, structure and history, 258 Tubicinella, 209 Turrilepas, 261 Turtles: Barnacles on, 209: Gulf-weed Crab on, 209 Underground Crustacea, 184 Uropods of Lobster, 6 Venus's Flower-basket, Crustacea in, 210 Water-fleas, 37, 165 Weismann on parthenogenesis of Cypris, 172 Well Shrimp, 184 Westwood, J. O., on development of Land Crabs, 192 Whales, Barnacles on, 209 Whale-food, 138 Whale-lice, 56: habits, 224 White-clawed Crayfish, 242 Willey, A., on breeding of Robber Crab, 199 Williamson, H. C., on habits of Lobster, 25 Wood-boring Crustacea, 253 Woodlice, 51: development of, 79; habits and structure, 199; distribution of, 206; destructive in gardens, 253 Worms: and Hermit Crabs, 215: Copepoda parasitic in, 230 Zoëa of Shore Crab, 69: of Caridea, 73; of Porcelain Crab, 70; of Munida, 71; of Penæus, 75; of Sergestes, 75, 148; of Robber Crab, 199

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