CONTENTS. 



PAGE 



jSTo. 1. The Aseidians Collected by the United States Fisheries Bu- 

 reau Steamer Albatross on the Coast of California during the 



Summer of 1904, by Wm. E. Eitter. With Plates 1-3 1-52 



Introduction _... 1 



Table of Species 1-2 



Description of Genera and Species 3-44 



Bibliography 45-46 



Explanation of Plates 48-52 



No. 2. Behavior of the Starfish Asterias forreri de Loriol, by H. S. 



Jennings. With 19 text-figures 53-185 



Introductory 56 



Behavior of -the Starfish 58 



Eespiration and its protection by the Pedicellariae 59-63 



Detailed Behavior of the Pedicellariae 64-82 



Capture of Food 84-94 



Behavior of the Starfish in selecting the Conditions of Existence 94-101 



Reaction to Light 102-110 



Positive Reactions 113-118 



Righting Reaction 120-147 



Formation of Habits in the Starfish 148-169 



Unified Impulse and the Determination of the varied Activities 



under its Influence 169-182 



Concluding Statement 183 



Bibliography 184 



No. 3. The Early Life-History of DoUclioglossus pusiUus Eitter, by 



B. M. Davis. With plates 4-8 187-226 



Introduction 188 



Periods of Development 190-191 



Early Habits and Activities of D. imsillus 192-195 



Early Growth Stages 200-212 



Occurrence of Half Embryos and Double Embryos 213 



Comparison of D. pusillus and Ami/hioxus ^vith reference to Origin 



of Body Cavities 213 



Bibliography 216 



Explanation of Plates 218-226 



