xiv GENERAL BIOLOGY 



chaeology, p. 498. Ethnology, p. 494. Ontogeny, p. 498. 

 3. The social organism, p. 500. Animism, p. 502. Social 

 integration, p. 507. Social conduct, p. 509. 



.- : : :.;. v .- " . vs , " " . ' : 



PRACTICAL EXERCISES. 

 Study 60. Demonstration of functions of some of the principal parts 



of the nervous system in the frog, p. 456. 



Study 61. Observations on certain activities of caterpillars, p. 472. ? 

 Study 62, The case-building instincts of caddis worms, p. 477. 

 Study 63. Experiments with trial and error in chicks, p. 481. 

 Study 64. Survivals of animism, in our own times, p. 504. 



APPENDIX. 



Preliminary outline and instructions, p.- 513. Lenses, lighting, 

 etc., p. 513. Stage mounts, p. 518. Dissecting, p. 519. Draw- 

 ings, p. 520. 2. Materials for the practical exercises, p. 520. 3. 

 Supplementary studies. Plancton, p. 525. Instincts of the tent cater- 

 pillar, p. 527. 



PRACTICAL EXERCISES 



(Added in the 6th Edition) 



44a. An examination of lake plancton, p. 527. 



620,. Observations on a series of instinctive activities in the tent 

 caterpillar, p. 529. 



INDEX. 



Pages 535-546. 



PORTRAITS: Schultze, p. 89; Pasteur, p. 93; Von Baer, p. 174; 

 Linnaeus, p. 220; Agassiz, p. 224; Darwin, p. 277; Leeuwenhoek, 

 p. 298; Mendel, p. 309; Aristotle, p. 470. 



