INDEX 



439 



Carbon dioxide, test for, 22. 

 Carnivorous, denned, 312. 

 Catarrh, 389. 

 Catkin, 47. 

 Cell, 29 ; 



as a unit, 194. 

 Cell membrane, 8&. 

 Cell sap, 89. 

 Cell tissue, 205. 

 Cells, 205 ; 



sizes and shapes of, 30. 

 Centipede, poisonous, 246. 

 Centrum, 327. 

 Cephalopods, 270, 273. 

 Cephalothorax, 222. 

 Cerebellum, 401. 

 Cerebrum, 401 ; 



functions of, 403. 

 Cestodes, 217. 

 Chelipeds, 222. 



Chemical element and compound, 18. 

 Chlorophyll bands, 147. 

 Chlorophyll bodies in leaf, 120. 

 Chromosomes, 29. 

 Chrysalis, 237, 238. 

 Cicada, 242, 243. 

 Cilia, 191. 

 Circulation, effects of alcohol on, 379 ; 



effect of exercise on, 377 ; 



effect of tobacco on, 381 ; 



in a mammal, 372 ; 



in capillaries, 373, 374 ; 



in crayfish, 225 ; 



in fishes, 279 ; 



in frog, 287, 373 ; 



in kidney, 391 ; 



in man, 370 ; 



organs of, 206 ; 



portal, 362, 372 ; 



pulmonary, 372 ; 



systemic, 372. 

 Clam, fresh-water, shell of, 268 ; 



round, parts of, 269. 

 Class, defined, 157. 

 Club mosses, 156. 

 Coelenterates, 207, 208, 209 ; 



compared with worms, 215. 

 Colds, cause of, 394. 

 Coleoptera, 242, 247. 

 Colloid, defined, 358. 



Combustion, 22. 



Composite head, parts of, 44. 



Conjugation, 148, 150; 



in black mold, 150 ; 



in paramoecium, 192. 

 Contagious diseases, death rate 



from, 429. 

 Copepod, 231. 

 Coral, madreporic, 209. 

 Coral reefs, 210. 

 Corn, grain of, 69 ; 



production of, 58. 

 Corn grain, foods in, 70, 73. 

 Corn smut, 174. 

 Corolla, 34. 

 Corpuscle, red, function of, 367; 



structure of, 367. 

 Corpuscle, colorless, functions of, 388 ; 



structure of, 367, 368. 

 Corpuscles, tactile, 321, 406. 

 Cortex, 87 ; 



in stem, 103. 

 Cotton, 61. 



Cotton boll weevil, 62, 262. 

 Cotyledons, as foliage leaves, 79 ; 



food in, 66 ; 



functions of, 79 ; 



in bean, 65 ; 



of corn, 69. 

 Crab, blue, 229 ; 



fiddler, 229 ; 



giant spider, 230 ; 



hermit, 229. 



Crayfish, adaptation for protection, 

 222; 



and allies, characters of, 231 ; 



appendages, 224 ; 



external structure, 222 ; 



internal structure, 225 ; 



senses of, 223. 

 Crops, rotation of, 95. 

 Cross-pollination, defined, 38. 

 Crustacea, degenerate, 232. 

 Crustaceans, 222 ; 



habitat of, 231 ; 



parasitic, 232. 

 Crystalloid, defined, 358. 

 Culture, pure, 176. 

 Cuts, treatment of, 378, 394. 

 Cytoplasm, 30. 



