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 _Coenobita_, 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