270 



INDEX. 



of 



Sea-Pens, 163, 212. 



Sea-Shrubs, 154. 



Secretive organ, of Cestum, 147. 



Segmentation, of ovum, 15. 



Sense-organs, of Hydrozoa, 39 

 Actinozoa, 166, 168. 



Septa, 155 ; development of, 173. 



Septal formulae, 174. 



Seriatoporidce , 205, 206, 232, 237, 244, 

 245. 



Serous layer, of blastoderm, 16. 



Sertularia, 90, 95, 127. 



Sertulariadce , 77, 92, 95. 



Sertularidce , general characters of, 

 79, 90 ; development of, 56 ; cceno- 

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

 hydrothecae of, 35, 92 ; polypites of, 

 92 ; tentacles of, 93 ; nematophores 

 °f» 95 5 gonoblasiidia of, 46 ; gono- 

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

 distribution of, 126 — 8. 



Silurian Corals, 243. 



Size, of Ccelenterata,6; of Hydrozoa, 

 28 ; of Actinozoa, 140. 



Smilotrochus, 246. 



Smithia, 244. 



Solenastrcea, 241. 



Somatic cavity, of Ccelenterata, 3. 10, 

 17; of Hydrozoa, 17, 29. 31 ; of Ac- 

 tinozoa, 17, 141, 144—7. 



Somatic chambers, of Actinozoa, 134, 

 146. 



Somatic fluid, 6. 



Somatocyst, of Calycophoridce, 96. 

 Spermaria, of Hydrozoa, 40, 50; of 

 Actinozoa, 169. 



Spermatozoa, 15; of Hydrozoa, 50; 



of Actinozoa, 169. 

 Sphenotr ochus , 240. 

 Sphceronecies, 98, 99. 

 Splice r one ctidce, 100. 

 Spicular corallum, 160, 162, 209. 212. 

 Spicules, of Alcyonidce and Zoanthidce, 



160 ; of G or gonidce ; 161. 

 Spiral cnida?, 150, 151. 



Spongophyllum, 244. 

 Sporosac, 40, 45. 



Spurious ccenenchyma, 205. 

 Stauria, 214, 244. 



Stauridce, 215, 237, 244, 245. 

 Staundia, tentacles of, 87 : 



phores of, 88, 89. 

 Steenstrupia, 63. 



Steganophthalmata, 120. 

 Stelloria, 246. 



Stenostomata, 219, 230. 

 Stephanocccnia, 239. 

 Stephanomia, 108, no, 112. 

 Stephanomiadce , 113. 

 Stephanophyllia, 240, 

 Stereopsamnia, 247. 

 Stinging powers, of Ccelenterata, 5. 

 Stomach, of Actinozoa, 132, 141, 144 



Stomachal filaments, of Lucemar idee, 

 124. 



gono- 



Stomatodendra, of Rhizostomidce , 40. 

 Stomobrachium, fission of, 63. 

 Strebla, 151. 



Streptelasma, 244. 

 Strobila, 66. 



Strombodes, 244. 



Sty lax is, 245. 



Sty Una, 239, 245. 



Styloccenia, 240. 



Stylocyathus, 246. 



Stylophora. 174, 240. 



Stylophoridce ; 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 Calycophoridce, 96—9 ; of Phyto- 

 phoridce, 107 ; of Medusidce, 115— 6. 



Symphyllia, 241. 



Synapticulae, 155, 203. 



Syndendrium, of Rhizostomidce, 49. 

 Synhcelia, 246. 



Syringophyllum, 238. 



Syringopora, 238. 



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

 Tabulae, 156. 



Tactile organs, of Hydrozoa, 40 ; of 



Ctenophora, 168. 

 Tamoya, 126. 

 Tangled cnidae, 150, 151. 

 Tegumentary organs, of Hydrozoa, 



34; of Actinozoa, 149. 

 Telestho, 159, 209. 



Tentacles, of Hydrozoa, 32; of ^c- 

 tinozoa, 148 ; of Hydridce, 20 ; of 

 Corynidce, 32, 85; of Sertularidce, 

 32, 93 ; of Calycophoridce, 32, 33 ; 

 of Physophoridce, 32, 33, ill 5 of 

 Medusidce, 32, 117; of Lucerna- 

 ridce, 32, 121, 125 ; of Zoantharia, 

 148, 199 ; of Alcyonaria, 148 ; of 

 Ctenophora, 225. 



Tertiary Corals, 247. 



Thalassianthus, tentacles of, 200. 



Thamnastrcea, 239. 



Thaumantiadce, 120. 



Thaumantias, 63, 129. 

 Theca, 155. 



Thecia, 244. 



Thecidce, 205, 237, 242, 244. 



Thecocyathus, 246. 



Thecosmilia, 239. 



Thecostcgites, 244. 



Thread-cells, of Ccclenterata, 3 ; of 



Physalia, 5 ; of Hydra, 20 ; of ^4c- 



tinozoa, 150. 



Tichastrcea, 247. 



Time, relations to, of Hydrozoa, 130 ; 



of Actinozoa, 236. 

 Tissue secretion, 153. 

 Trachynema, 60, 117. 

 Trachynemidce, 119, 120. 



