10 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



FIGURES IN TEXT 



i . Section of ray of Starfish 



2. Diagram of water-vascular system of Starfish 



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



ferent conditions .... 



4. Larva of Starfish .... 



5. Larva of Starfish .... 



6. Young Starfish shortly after metamorphosis 



7. Young Starfish devouring a mollusk . 



8. Pedicellarias of Starfish .... 



9. Oral surface of disk of Ophiuran 



10. Diagram of section of arm of Ophiuran 



11. Larva of Ophiuran, Ophiopholis aculeata 



12. Larva of Ophiuran, Ophiura brevispina 



13. Aboral skeleton of Sea-urchin, Arbacia punctulata 



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



1 5. Cleavage of egg of Sea-urchin . 



16. Larva of Sea-urchin 



17. Young Sea-urchin immediately after metamorphosis 



18. Young Sea-urchin, Arbacia punctulata 



19. Young Disk-urchin, Mellita pentapora 



20. Diagram of section of body of Holothurian 



21. Oral tentacle of Holothurian 



22. Cucumaria pulcherrima . 



23. Plates of Cucumaria pulcherrima 



24. Plates of Cucumaria pulcherrima 



25. Plates of Thyone briareus 



26. Plates of Thyone unisemita 



27. Plates of Thyone scabra . 



28. Plates of Synapta inhcerens 



29. Plates of Synapta roseola 



PACE 



23 

 27 



42 



54 

 54 

 55 

 58 

 62 

 70 

 72 

 78 

 78 

 88 



93 



101 



102 



103 

 104 



105 



"5 

 120 



130 



131 



132 



134 

 136 



137 



140 



143 



