270 



INDEX. 



Sea. Pens, i6}. aiz. 



Sea-Shrubs, 154. 



Secretive organ, of Cestum, 147. 



Segmentation, of ovum, 15 



Sense-organs, ol Hydroxoa, 39; of 



Actinozoa, 166, 168. 

 Septa. 155 : development of, 17J. 

 Septal formulffi, J74. 

 Seriatoporidce, 205, zo6, Z32, 237, 244. 



245. 

 Serous Liyer, of blastoderm, 16. 

 Sertularia, 90, 95. 127. 

 Sertulariadcc, 'j'j. 92,, 95. 

 Sertularidce, geniral characters of, 

 79, 90 ; development of, 56 ; cceno- 

 sarc of, 90 ; polypary of, 35. 92 ; 

 hydrotliCLae ol, 35, 92 ; polypites of, 

 92 ; tentacles ol, 9} ; nematophores 

 of, 95 ; gonoblasiidia of, 46 ; gono- 

 phores of, 44, 93 ; families of, 95 ; 

 distribution of, 126—8. 

 Silurian Corals, 243. 

 Size, of Cuelenterata,f)\ of Hydroxoa, 



28 ; of Actinozoa, 140. 

 Smilntrochits, 246. 

 Stnithia, 244. 

 Solenastraa, 241. 



Somatic cavity, of Ccelenterata, 3, 10, 

 17; of Hydxizoa, 17, 29. 31 ; oi Ac- 

 tinozoa, 17. 141, 144—7. 

 Somatic chambers, oi Actinozoa, 134, 



146. 

 Somatic fluid, 6. 



Somatocyst, of Cafi/cophoridir, 96. 

 Spermaria, of Hydruzoa, 40, 50 ; of 



Actinozoa, 169. 

 Spermatozoa, 15; of Hydroxoa, 50; 



of Actinozoa, 169. 

 Spkefiolrochus, 240. 

 Sphixronectes, 98. 99. 

 Sphceronectidce, 100. 

 Spicular coral lum, 160, 162, 209. 212. 

 Spicules.of v^/ryon/rftj-and Zoanthidce, 



160 ; of Gor^onid(S, 161. 

 Spiral cnidfe. ijo, 151. 

 Spongophyllum, 244. 

 Sporosac, 40, 45. 

 Spurious ccenenchyma, 205. 

 Stauria, 214, 244. 

 Stawidce, 215, 257, 244, 245. 

 Stauridia, tentai-les of, 87 ; gono- 



phores of, 88, 89. 

 Steenstrtipia, 63. 

 Steganophthalmata, 120. 

 Stelloria, 246. 

 Stenostomala, 219, 230. 

 Stephanocoenia, 239. 

 Stephanomia, 108. no, 112. 

 Stephanitminda;, 113. 

 Stcphanophyllia, 240. 

 Stereopsam u ia, 247 . 

 Stinging p(jwers, of Ccclenternta, 5. 

 iitomAch,oi Actinozoa, 132, 141, 144. 

 Stomachal filaments, oiLucernaridce, 

 IZ4. 



Stomatodendrn, of Rhizostomid<s, 49 



S/onit/brar/iium, fission of, 6j. 



Strebla, 151 



Streptelas'iia, 244. 



Strobila, 66. 



Strombodes, 244. 



Stylaxis, 245. 



Stt/iina, 239, 245. 



Slylucdenia, 240. 



Stylocyathus, 246. 



Stylophora, 174, 240. 



Styluphoridce, 207, 237, 247. 



Stylosmilia, 239. 



Successive development, of appen* 

 dages in Hydrozoa, 70 ; of mesen- 

 teries and tentacles in Actinozoa, 

 132, 172 ; of septa in corallite, 173. 



Swimming-bells, of Hydrozoa, 27, 36 ; 

 of Caiycophoridce, 96—9 ; of Phyno- 

 phoridcE, 107 ; of Medusidce, 115 — 6. 



Symphyllia, 241. 



Synapticulae, 155, 203. 



Syndendriiim, o{ Rhixostomidce, 49. 



Syrihoelia, 246. 



Syringophyllum, 238. 



Syringopora, 238. 



Tabulata. ic8, 161, 205, 237, 242, 

 Tabulffi, 156. 



Tactile organs, of Hydrozoa, 40 ; of 

 Ctenophora, 168. 



Tamoya, 126. 



Tangled cnidae, 150, 151. 



Tegnmenfary organs, of Hydroxoa, 

 34 ; of Actinozoa, 149. 



Telestho, 159. 209. 



Tentacles, of Hydrozoa, 32; of Ac- 

 tinozoa, T48 ; of Hydridis, 20 ; of 

 Corynida, 32, 85; of Sertularidce, 

 32, 93 ; of Caiycophoridce, 32, 33 ; 

 of Fhysnphori'dcc, 32, 33, III ; of 

 Medusidce, 52, 117; of Lucerna' 

 ridce, 32, 121, 125; of Zoantharia, 

 148, 199 ; of Alcyonaria, 148 j of 

 Ctenophora, 225. 



Tertiary Corals, 247. 



Thalassianthus, tentacles of, 200. 



Thamnaslraa, 239. 



Thaumantiadce, 120. 



Tliauiiiantias, 63, 129. 



Theca, 155. 



Thecia, 244. 



ThecidcB, 205, 237. 242, 244. 



Thecucyathus. 246. 



Thecosvitlin, 239. 



Thecostcfiites, 244. 



I'hread-cells. ol Ccelenterata, j ; of 

 Physalia, 5 ; of Hydra, 20 ; of /Ic- 

 tinozoa, 150 



Tichastrcea, 247. 



Time, relations to, of Hydrozoa, I30,; 

 of Actinozoa, 236. 



Tissue secretion, 153. 



Tracfiyneina, 6q, 117. 



Trachynemidce, 119, IZO. 



