CONTENTS. 



PREFACE. 



PAET I. EiMBRYOLOGY OF THE STARFISH. 



CHAPTER FIRST. Artificial Fecundation, and History of the Development of the 

 Larva, p. 3. 



CHAPTER SECOND. History of the Development of the Starfish proper, p. 30 ; 

 Recapitulation, p. 36. 



CHAPTER THIRD. Embryological Classification of Starfishes, p. 59. 



CHAPTER FOURTH. Examination of the Investigations of former Observers, p. 66. 



CHAPTER FIFTH. On the Plan of Development of Echinoderms, p. 75. 



PART II. On the Solid Parts of some North American Starfishes. 



Homologies of Echinoderms, p. 87 ; Description of the Hard Parts of some North 

 American Starfishes, p. 94 ; Asterias, p. 94 ; Echinaster sentus, p. 97 ; Crossaster, 

 p. 98 ; Pycnopodia helianthoides, p. 100 ; Brisinga, p. 102 ; Luidia Guildingii, p. 105 ; 

 Asterina folium, p. 106 ; Asteropsis imbricata, p. 106 ; Pentaceros reticulatcs, p. 108 ; 

 SoLASTER endeca, p. 112 ; Cribrella sanguinolenta, p. 113 ; Astropecten articclatcs, 

 p. 114 ; Luidia clathrata, p. 117 ; Fascicles op Starfishes, p. 119. 



NOTE, p. 121. 



EXPLANATION OF THE PLATES, p. 122. 



