INDEX. 



397 



CHE 



Cheese-maggots, their jumping powers, 



198 



Chelonians, their means of defence, 268 

 Cimex griseus, its parental affection, 



225 



Cinnamon-tree, 70 

 Cirripeda, 175 

 Click-beetles, 199 



Climate, causes of the varieties of, 40 

 Climbing perch, respiration of the, 261 

 Climbing plants of the tropical forests, 



58 



stems of, 66 



their various modes of attachment, 



66 



Clio, its conical appendages of the head, 

 160 



its dental apparatus, 161 

 Clothes-moth, the, 211 

 Clouds, formation of, 31 



Coal, conditions of the earth under which 

 the formation of, took place, 42, 44 



character of the vegetable life of 



which the coal-fields consist, 42 



space of time required for the forma- 



tion of the coal-fields, 43 



thickness of the coal-bearing strata 



and of the carboniferous system, 

 43, 44 



faults in coal-strata, and their advan- 



tages and disadvantages, 44, 45 

 Cockchafer, alimentary canal of the, 



197 



Cockle, the common, 150 

 Cocoa-nut tree, roots of the, 57 

 Conchifera, or bivalve shell-fish, 149 



nervous system of, 153 



their food, 154 



Condor, his prodigious flight, 287 

 Copernicus, his discovery of the rotation 



of the earth, 4 



Coral islands, formation of, 122 

 Corals, 120 

 Corolla of a plant, 79 

 Cotton, filaments of, 86 

 Cow- tree of Guiana, 70 

 Crabs, feet of, 178 



their moulting process, 180 



their faculty of reproducing lost 



limbs, 181 



changes of crabs, 182 

 larva of the crab, 182 



land-crabs, 183 



their food, 184 



their enemies and means of defence, 



184 



Birgus latro, 185 



hermit-crabs, or paguri, 186 



instinct of crabs, 187 

 Creeping plants of the desert, 57 



stems of, 66 



EAR 



Crocodile, tongue of the, 276 

 , its means of swimming, 276 

 Crops of birds, 299 

 Crossbill, beak of the, 296 

 Crow, beak of the, 294 

 Crustaceans, 175 



barnacles, 175 



acorn- shells, 175 



edriophthalmia, 177 



thoracostraca, 177 



stomatopoda, 177 



decapoda, 177 



legs of crustaceans, 178 



their digestive apparatus, 179 



their moulting processes, 180 



their food, 184 



their enemies, 184 



their means of attack and defence, 



184 



their modes of escaping attacks, 186 



their instincts, 187 

 Cuckoo, instincts of the, 311 

 Curculio nebulosus, defence of the, 205 

 Cuttle-fish, 161 



its sucking disks, 162 

 Cyami, or whale-lice, 177 



claws of the, 179 

 Cydippe, 128 



DECAPODA, arms and tentacles of 

 the, 163 



their structure, 177 



their branchial apparatus, 178 

 Deer, structure of the, 326 

 Deirodon, vertebral teeth of the, 279 

 Desmidiacese, the, 97 



Dew, causes of, 30 



Diatomacese, the, 98 



Dionea muscipula, or Venus's fly-trap, 



sensibility of the leaves of, 75 

 Diphyes campanulifera, 129 

 Dog, sense of smell of the, 352 



his affection for man, 373 



his intelligence, 376 

 Dolphin, playfulness of the, 380 

 Dromiae, means of defence of the, 185 

 Duckbill, burrow of the, 366 

 Dugong, fins of the, 319 

 Dung-beetles, instincts of, 220 



their intelligence, 222 

 Dytiscidae, or water-beetles, legs of the, 



199 



EARTH, its form and dimensions, 2, 3 

 _ Copernicus's discovery of its rota- 

 tion round the sun, 4 

 dependence of terrestrial life on the 

 actual distance of the earth from 

 the sun, 12 



