CONTENTS. 



CHAPTER XII. 



THE SELECTIVE INFLUENCE OF LIVING ORGANISMS 

 ON ANIMALS, 



PACK 



Indirect Selection. Competition for Similar Conditions. Eela- 

 tions of the Pursued and the Pursuer. Transition Forms, in 

 Lamellicorn Beetles. Modifications leading to Physiological 

 Function. The Dorsal Eyes of OnoUdium. Its Defensive 

 Glands. Protection by Imitation or Mimicry ; in Insects. 

 Difficulties with regard to Polyps and Fishes. New Instances 

 among Univalve MoUusca in the Philippines. False Mimicry 

 in a Worm in the Mediterranean. Caution as necessary as 

 Eesearch 360 



Notes . . 407 



Index .... ....,..• 469 



