49<5 



PHYSIOLOGY AND MORPHOLOGY OF ANIMALS. 



lung, 373 ; of arthropods, 399 ; 

 of bivalves, 401 ; of gastro- 

 pods, 403 ; of echinoderms, 

 404; of insects, 411. 



Capillaries, 383. 



Cephalization, 82. 



Cerebellum, 32, 40. 



Cerebro-spinal system, 29. 



Cerebrum, 31, 39 ; relative size 

 of, 76. 



Chromatism, 107. 



Circulation of blood in man, 

 375-380; in reptiles and am- 

 phibians, 385 ; in arthropods, 

 400 ; in bivalves, 402 ; in gas- 

 tropods, 403 ; in cephalopods, 

 404 ; in echinoderms, 405 ; in 

 insects, 408. 



Classification, definition of, 9. 



Classification of animals, out- 

 line of, 70, 71. 



Classification of fishes by scales, 

 460. 



Claws, 454. 



Coats of the eyeball, 101. 



Color-blindness, 139-141. 



Color perception, 137. 



Colors, primary, 136. 



Contact, kinds of, 97. 



Continental faunal regions, 

 477-481. 



Contents of the eye, 103. 



Corals, 466-469. 



Corpus striatum, 41. 



Cranial nerves, 46, 54. 



Dental formulae, 299. 

 Diabetes, cause of, 449. 

 Digestion, mouth, 292-310 ; 



stomach, 310-318 ; intestinal, 



319-331. 



Digestive system in inverte- 

 brates, 331-346. 



Dim-sightedness, 115. 



Distribution of organisms, the- 

 ories of the origin of, 485- 

 489. 



Ear, human, structure of the, 

 174-181 ; mode of action of 

 the whole, 181 ; functions of 

 parts of, 181, 182 ; of birds, 

 1S3 ; of reptiles, 183 ; of fishes, 

 184 ; of mollusks, 185 ; evo- 

 lution of the, 187, 188. 



Elbow joint, 252. 



Embryology, definition of, 9. 



Emmetropy, 113. 



Eye of mammals, 156 ; of birds, 

 157 ; of reptiles, 138 ; of fishes, 

 159 ; of cephalopods, 163 ; of 

 arthropods, 164. 



Eye of man, its shape, setting, 

 etc., 99; muscles of, 100 ; 

 coats of the ball, 101 ; linings, 



103 ; formation of image in, 

 103 ; necessity of lenses in, 



104 ; application of principles 

 to, 105 ; compared with cam- 

 era, 107 ; chromatism in, 107 ; 

 aberration in, 108 ; adjust- 

 ment of, for distance, 108 ; ad- 

 justment of, for light, in ; 

 structure of the iris in, 112 ; 

 normal sight of, 113 ; defects 

 in sight of, 113-115 ; retina 

 of, 116-122. 



Fauna and flora, 471. 



Feathers, structure of, 457 ; 

 gradation of, to hairs, 458. 



Fishes, classification of, by re- 

 spiratory organs, 372, 373. 



