_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 _Coenobita_: habits, 194; respiration, 195 Coenobitidæ, 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 _Conchoecia_, 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