268 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



EXPLANATION OF PLATES. 



oc, otocyst ; 711. s., marginal sense organ. 



PLATE 1. 



Fig. L Euplij'sa tetrabrachia. 



Fig. 2. Oceania brunescens. 



Fig. 3. " virens. 



Fig. 4. " " bell margin. 



Fig. 5. Eirene danduensis, bell margin. 



PLATE 2. 



Fig. 6. Eirene danduensis. 



Fig. 7. Eutimeta lactea. 



Fig. 8. " " bell margin. 



Fig. U. Aglaura oclagona. 



PLATE 3. 



Fig. 10. Timoides agassizii. 



Fig. 11. " " bell margin. 



PLATE 4. 



Fig. 12. Gonionemus pelagicus. 



Fig. 13. " " bell margin. 



Fig. 14. " " tip of tentacle. 



Fig. 15. Liriope liemisphericus. 



Fig. 16. " " bell margin. 



PLATE 5. 



Fig. 17. Liriope indica. 



Fig. 18. " " bell margin. 



Fig. 19. Pegantlia simple.x. 



Fig. 20. " " oral view. 



