Abdomen of Lobster,6Abyssal fauna of lakes,185Acanthephyridæ,268Acorn-shells,41Æga: in Sponges,210;parasitic on fish,219Æger,267Æglea,181Air-breathing Crabs,188Albunea,102Alcock, A.: on habits ofOcypode,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;onNephrops,132;on habits ofCœnobita,194,195Allen, E. J., on Mackerel fishery,251Alpheidæ,211American Lobster,32Amphibious Crustacea,104,188Amphipoda,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,255Amphithoë,95Anaspides, structure and fossil allies,264Andrews, C. W.:on Land Crabs,190;on habits ofCœnobita,195;on habits ofBirgus,197,198Anomalocera,150Anomura,60:fresh-water,181Anostraca,36:habits,162,164Antennæ of Lobster,8,14:use in respiration inCorystes,100;inAlbunea,102Antennule of Lobster,8,14Ants, Woodlice living with,205Apseudes,50Apus,36:habitats,161;occurrence in Britain,162;habits,163;hæmoglobin in,165;fossil allies of,260Appendages of Lobster,8:of Trilobites,259Aratus,189Argulus,41Aristotle on Shrimp living with Mollusc,218Armadillidium,203Artemia:larvæ of,81;habitat,164Arthropoda,2:classification,204Asellus,172:destroying fishing nets,253Astacidæ,176Astacoides,178Astacopsis,177:used for food,243Astacura,60Astacus:habits,174;young,76;distribution,177;used for food,241Asymmetry of Lobster,29Atyidæ,179:used for food,248Autotomy,113:in Lobster,30Baikal, Lake,182Balanus,42:larvæ,83;habits,114;used for food,237;cultivated for manure,250Barnacles,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,261Bathynomus,131Beach-fleas,107Bell, T., on development of Land Crabs,193"Berry," Lobster in,28Bipolarity,132Birgus,94:habits and structure,195;breeding habits,199.See also Robber CrabBloodvessels of Lobster,17Blue Crab,249Bopyroides,221Bopyrus,221Borradaile, L. A.:on habits ofRemipes,102;onHuenia,110;on larvæ of Robber Crab,199Bouvier, E. L., on Dromiacea,134Brachygnatha,63Brachyrhyncha,64:fossil,270Brachyura,62:fossil,269Brain of Lobster,20Branchiopoda,35:larvæ,80;habitats,161;fossil,260Branchiostegite,18Branchipus,165Branchiura,41Brine Shrimp,164:larvæ,81Brood-pouch of Peracarida,46Brown Shrimp,244Browne, F. Balfour, onApusin Scotland,162Browne, Patrick, on Mountain Crab,193Bullen, G. E., on food of Mackerel,251Bythotrephes,168Caligidæ,225Caligus,225Callianassa,103Callinectes,249Calocalanus,149Cambaroides,177Cambarus:distribution,177;habits,178;blind species,185;used for food,243Cancer:used for food,248;fossil,270.See also Edible CrabCancrinus,269Canthocamptus,170:resting stage,171Caprella,54Caprellidæ,55:habits,109Carapace of Lobster,6,9Carcinus:larval stages,68;habits,107.See also Shore CrabCardisoma,191Caridea,59:zoëa of,73;fossil,268Caridina,248Carp-lice,41Caspian Sea,182Caudal fork,40Cephalothorax of Lobster,8Ceratiocaris,262Chalimus,225Chela of Lobster,12Cheliped of Lobster,8Chelonobia,155,209Chelura,255Cheraps,177Chilton, C., on Woodlice in New Zealand,206Chirocephalus,35,161Chitin,15Chondracanthus,228Chromatophores,31,110Chun, C., on eyes of plankton Crustacea,154Chydorus,165Cirolana,218Cirripedia,41:development,82;on Whales,209;parasitic,231;fossil,261.See also BarnaclesCladocera,37:development,80;habits,165;in plankton of lakes,168;absence from Tanganyika,184Claspers ofChirocephalus,35Classification of Crustacea, table,34:of Decapoda, table,58Close time for Lobsters,239Coconut Crab. See Robber CrabCocoons of Copepoda,171Cœnobita:habits,194;respiration,195Cœnobitidæ,61:habits,194Colour of Lobster,31:deep-sea Crustacea,127;plankton Crustacea,150;Branchiopoda,165;subterranean Crustacea,187Colour-change,110Columbus and Gulf-weed Crab,155Commensalism,207Conchoderma,209Conchœcia,144Conchostraca,37:habits,163Convergent evolution,205Copepoda,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,250Copilia,152Coral of Lobster,27Corals, Crustacea on,210Coronula,155,209Corycæidæ,152Corystes,99Crabs: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,244Crawfish, Sea-,59Crayfish:young of,76;habits,174;distribution,176;terrestrial,178,189;blind, in caves,185;in British Isles,241;used for food,241;disease of,243Cumacea,48:habits,98;of deep sea,129;of plankton,141Cunningham, J. T., on development of Land Crabs,192Cup Shrimps,245Cyamidæ,56:habits,224Cyclops,40:nauplius,82;habits,170;resting stage,171;as host of Guinea-worm,252Cymothoa,220Cymothoidæ, habits,218Cymothoinæ, habits,220Cypris,38:reproduction,172Cypris stage of Barnacles,84:ofSacculina,233Cystisoma,145Cythereis,38Daphnia,38:development,81;habits,165;in plankton of lakes,168Darwin, C.:on fresh-water fauna,157,159;on habits ofBirgus,198,199;on Barnacles used for food,237Decapoda,57:fossil,267Deep-water Prawn,246Delage, Y., on development ofSacculina,232Development 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,232Diaptomus,170Diastylis,49Diatoms,139:relation to Mackerel fishery,251Dichelaspis,209Digestive gland,17Dispersal of fresh-water Crustacea,159:of Crayfishes,174Distribution of Woodlice,206Doflein, F., on luminosity in marine animals,126Dogfish, Barnacle parasitic on,235Dorippe,95Dracunculus,252Dromia,63:habits,96;and Sponge,215Dromiacea,63:of deep Sea,128,134Dublin Prawn,33:fishery,240Ebalia,63: