434 



INDEX 



Circulation in man, portal, 357; 



pulmonary, 356, 357; 



systemic, 356, 357. 

 Clam, economic importance of, 264; 



"long," 264; 



"round," 264. 

 Classification of plants, 150. 

 Cleistogamous flower, 42. 

 Clitellum, 208, 211. 

 Club moss, 156. 

 Cluster cup, 165. 

 Cnidoblasts, 196. 

 Cocoon, 237. 



Ccelenterates, alternation of genera- 

 tions in, 199 ; 



classification of, 202 ; 



di\ision of labor in, 197; 



meaning of, 195; 



organs of offense in, 196. 

 Coleoptera, 244. 

 Colloids, 337. 

 Combustion defined, 16. 

 Communal life, of ants, 253; 



of bee, 250; 



of bumblebee, 249. 

 Comparison, between earthworm and 

 hydra, 210; 



between skeleton of child and of 

 adult, 377; 



between skeleton of man and of 

 frog, 371; 



between starch making and mill- 

 ing, 131. 

 Composite head of flower, 48. 

 Composition of water, 18. 

 Conjugation, defined, 161; 



in mold, 161; 



in paramcEcium, 181; 



in Spirogyra, 176. 

 Connective tissue cells, 189. 

 Coral, asexual reproduction in, 201 ; 



cup, 201; 



economic importance of, 201 ; 



formation of, 201 ; 



madreporic, 201. 

 Coral reefs, 202. 

 Corky layer, use of (Exp.), 110. 

 Corn, production of, 62, 63. 

 CoroUa, 31. 



Corolla in cross-pollination, 39. 

 Corpuscles, colorless, 346, 347; 



red, 345, 346; 



tractile, 395, 419. 

 Cotton, distribution of, 64. 

 Cotton-boll weevil, 245. 

 Cotyledons, 66; 



as foliage leaves, 70 ; 



food in, 67. 

 Crab, asymmetry in hermit, 223; 



edible blue, 222; 



fiddler, 223; 



hermit, 223; 



metamorphosis of, 223; 



spider, 224; 



symbiosis between sea anemone 

 and, 224. 

 Crane, handbill, 305. 

 Crayfish, 215, 218; 



activities of, 215; 



circulation in, 218; 



development of, 219; 



digestion in, 219; 



excretion in, 219; 



habitat of, 215; 



mouth parts of, 217; 



nervous system of, 219; 



protective coloration of, 215. 

 Crinoid, 207. 

 Crustaceans, classes of, 225; 



compared with insects, 227; 



degenerate, 225, 226; 



habitat of, 224; 



parasitic, 225; 



structures common to all, 226. 

 Cryptogams, 151. 

 Crystalloid, 337. 

 Cuts, treatment of, 360. 

 Cyclops, 225. 

 Cyme, 47. 

 Cytoplasm, 26. 



Damsel fly, 244. 



Deer, Virginia, 315. 



Degenerate crustaceans, 225, 226 



Deliquescent trunk, 102. 



Delirium tremens, 411. 



Dendrites, 402. 



Desert conditions, 143, 145, 147. 



