XIV 



ILLUSTRATIONS 



FIG. 

 36. 



37- 



38- 



39- 

 40. 



41. 



42. 



42 



43- 



44. 



45- 

 46. 



47- 

 48. 

 49. 

 50. 



5*- 



5 2 - 

 53- 

 54. 



55' 

 56. 



57- 



58. 



59' 

 60, 



61. 



62, 



63 



64 



65 



66 



67, 



68, 



69 



70. 



7i 



72 



73' 

 74 



75' 

 76. 



77 

 78. 



79 



Rlwpalura giardii ■ 

 Sycon gelatinosum, enlarged . 

 Sycon gelatinosum, in section . 

 Various forms of sponges 

 Sycon gelatinosum, natural size 

 Gemmulae .... 

 Sycandra raphanus, larva 

 bis. S\'lo/i raphanus, development 

 Sycon ciliatum 



Euplectella .... 

 Hydra ; nematocysts 



Obelia 



Various Hydromedusa; . 



Oceania languida . 



Hydra viridis ; Hydra vulgaris 



Millipora alcicornis 



Titrritopsis nittt ict/la 



Liriope ..... 



Physalia .... 



Halistemma tergestinum 



Diagram of a siphonophore 



Diagrammatic cross-section of a sea anemone 



Tealia crassicornis, dissected . 



Longitudinal section of an anthozoan polyp 



Meandrina 



Oculina . 



Adamsia palliata . 



Corallium rubrum . 



Tubipora mtisica 



Sea fan . 



Pennatula sulcata . 



Sea anemone . 



Aurelia aurita 



Aurclia aurita* development . 



Hormiphora {Cydippe) plumosa 



fdyia roseola .... 



Homiphora, section of tentacle 



Cestus veneris 



Cestus veneris, larva 



Ambulacral system of starfish 



Metacrinus intcrruptus . 



Anledon .... 



Granatocrinus 



Echinosphcerites aurantium 



Oral surface of starfish . 



53 



54 

 55 

 56 



57 



57 



58 



59 

 60 



61 



62 



63 

 64 



65 

 66 



67 



68 



68 



69 



70 



7i 



72 



73 



74 

 75 

 75 

 76 



77 

 77 

 78 

 79 



79 

 80 



81 

 82 

 82 

 83 

 *3 

 84 

 86 

 88 

 89 

 89 



89 

 90 



