UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 4, No. 2, pp. 53-185, 19 text-figures November 26, 1907 



CONTRIBUTIONS FEOM THE LABOEATORY 



OF THE 



MARINE BIOLOGICAL ASSOCIATION OF SAN DIEGO. 



V, 



BEHAVIOR OF THE STARFISH, ASTEBIAS 

 FORREBI DE LORIOL 



BY 



H. S. JENNINGS. 



CONTENTS. 



PAGE 



Introductory 56 



The nature of the problems of behavior; behavior as regulation 56 



Behavior of the starfish 58 



Species studied. Plan of investigation. 



Respiration and its protection by the pedicellariae 59 



Method of respiration 59 



The pedicellariae 60 



Their action in protecting the gills 60 



Capture of crabs, etc 63 



Detailed behavior of the pedicellariae 64 



Kinds of pedicellariae 65 



Action system of pedicellariae _ 66 



The attack 67 



Varied reactions 68 



Effects of different stimuli 69 



Opening, closing and grasping 70 



Closing 74 



Length of time that the jaws remain open 76 



Time of holding 76 



Pedicellariae of the rosettes 76 



Large solitary pedicellariae 78 



