CONTENTS 



PAGE 



INTRODUCTION 5 



POLYPI. 



ALCYONID.E ........ 7 



ACTINIAD^E . . ... . . . .7 



LUCERNARIAD^E ' . . . . . . . .8 



ACALEPHJE. 



PROLES POLYPOIDE.S: . . . . . . .8 



PROLES MEDUSIN/B . . . . . . .11 



BEROID MEDUSAE ........ 11 



ECHINODERMATA. 



. . .12 



EURYALEA ........ 12 



OPHIURID^E ........ 13 



ASTERIAD^B ........ 14 



ECHINID^E ... .... 15 



HOLOTHURIAD^E . . . . . . . .16 



BRYOZOA 17 



ACEPHALA. 



TUNICATA ... 19 



BRACHIOPODA .... 20 



LAMELLIBHANCHIATA . . 20 



GASTEROPODA. 



PROSOBRANCHIATA ....... 22 



TECTI BRANCH i ATA .... 25 



NUDIBRANCHIATA .... 25 



CEPHALOPODA. 27 



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