COiNTKX 1> 



CTENOI'HOIJA 

 CHAPTER XV 



PACE 



Ctexophora 412 



ECHIXODERMATA 



CHAPTER XYI 



ECHIXODERMATA — iNTiioDUCTioN— Classification— Anatomy of a Star- 

 fish-Systematic Account of Asteiioipea 



CHAPTER XVIT 



EcHiNOPERMATA (co.vr/.vrs^) : Oi'Hiuroii)EA=1'>iuttij-. Stars . . . 477 



CHAPTER XVIII 

 EcHiNDDERMATA (coAT/.vrBi^) : Echinoidea = Sea-Urchins . . . . 503 



CHAPTER XIX 



ECHIXODERM ATA (CO AT/ ATEB) : HoLOTHUROIDEA = Sea -CrCUMBERS . . 560 



CHAPTER XX 



Echinodermata {coxtixued) : Pelmatozoa — Crinoidea = Sea - Lilies — 



Thecoidea — Carpoidea — Cystoidea— Blastoidea .... 579 



CHAPTER XXI 

 Echinodermata (coxtixued) : Development and Phylogeny . . .601 



IXDEX 625 



