IO CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



FIGURES IN TEXT 



PACE 



1. Section of ray of Starfish . . . . -23 



2. Diagram of water- vascular system of Starfish . . 27 



3. Comparison of rate of growth of two starfishes under dif- 



ferent conditions . . . . . . 42 



4. Larva of Starfish . . . . . -54 



5. Larva of Starfish . . . . . -54 



6. Young Starfish shortly after metamorphosis . -55 



7. Young Starfish devouring a mollusk . . . 58 



8. Pedicellariae of Starfish . . . . . .62 



9. Oral surface of disk of Ophiuran . . . .70 



10. Diagram of section of arm of Ophiuran . . .72 



11. Larva of Ophiuran, Ophiopholis aculeata . . -78 



12. Larva of Ophiuran, Ophiura brevispina . . .78 



13. Aboral skeleton of Sea-urchin, Arbacia punctulata . . 88 



14. Aboral skeleton of Disk-urchin, Echinarachnius par ma . 93 



15. Cleavage of egg of Sea-urchin . . . . . 101 



16. Larva of Sea-urchin ...... 102 



17. Young Sea-urchin immediately after metamorphosis . 103 



1 8. Young Sea-urchin, Arbacia punctulata . . . 104 



19. Young Disk-urchin, Mellita pentapora . . .105 



20. Diagram of section of body of Holothurian . . . 1 1 5 



21. Oral tentacle of Holothurian . . . . .120 



22. Cucumaria pulcherrima . . . . . .130 



23. Plates of Cucumaria pulcherrima . . . 131 



24. Plates of Cucumaria pulcherrima . . . .132 



25. Plates of Thy one briar eus . . . . .134 



26. Plates of Thy one unisemita . . . . .136 



27. Plates of Thy one scabra . . . . . . 137 



28. Plates of Hynapta inharens . . . . .140 



29. Plates of Synapta roseola . . . . . 143 



