CONTENTS. 



PEEFACE. 



PAET I. Embryology of the Staefish. 



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

 Larva, p. 3. 



CHAPTER SECOND. History of the Development op 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. 



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



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

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

 p. 98 ; Pycnopodia helianthoides, p. 100 ; Brisinqa, p. 102 ; Luidia Gdildingii, p. 105 ; 

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

 Solaster endeca, p. 112 ; Cribrella sangdinolenta, p. 113 ; Astropecten articulatus, 

 p. 114 ; Luidia clathrata, p. 117 ; Fascioles of Starfishes, p. 119. 



NOTE, p. 121. 



EXPLANATION OF THE PLATES, p. 122. 



