Vlll 



My a japonica Jay 97 



Truncate Mya, Mya tnincata (Linnaeus) 98 



Ship worm. Teredo navalis Linne 99 



Bankia setacea (Tyron) 101 



Crisj^ate Zirphaea, Zirfaea crispata (Linne) 102 



Japanese Bamea, Barnea japonica (Yokoyama) 103 



CHAPTER II. LARVAE OF SEA STARS (MORPHOLOGY, 104 

 PHYSIOLOGY, BEHAVIOR) 



Identification of Pelagic Larvae of Sea Stars 127 



Patiria pectinifera (Muller and Troschel) 132 



Asterias amurensis Liitken 134 



CHAPTER III. LARVAE OF SEA URCHINS (MORPHOLOGY, 138 

 PHYSIOLOGY, AND BEHAVIOR) 



Identification of Pelagic Larvae of Sea Urchins 170 



Strongylocentrotus nudus Agassiz 177 



Strongylocentrotus intermedins (Agassiz) - 179 



Echinarachinus parma (Lamarck) 182 



Scaphechinus mirabilis (Agassiz) 185 



Scaphechinus griseus (Mortensen) 187 



Echinocardium cordatum (Pennant) 190 



CHAPTER IV. LARVAE OF BRITTLE STARS (MORPHOLOGY, 195 

 PHYSIOLOGY, AND BEHAVIOR) 



Identification of Pelagic Larvae of Brittle Stars 216 



Ophiura sarsi Liitken 221 



Amphipholis kochii Liitken 223 



CHAPTER V. LARVAE OF SEA CUCUMBERS (MORPHOLOGY, 225 

 PHYSIOLOGY, AND BEHAVIOR) 



Identification of Pelagic Larvae of Sea Cucumbers 244 



Far Eastern Trepang, Stichopus japonicus Selenka 246 



Japanese Cucumaria, Cucumaria japonica Semper 25 1 



Fraudulent Eupentacta, Eupentacta fraudatrix 253 

 (Djakonov and Baranova) 



CONCLUSION 255 



REFERENCES 258 



