270 



INDEX. 



Sea-Pens, 163, 212. 



Sea-Shrubs, 154. 



Secretive organ, of Cestum, 147. 



Segmentation, of ovum, 15 



Sense-organs, of fJi/druzua, 39 ; of 



Actinozoa, j66, 168. 

 Septa, 155 ; development of, 17J. 

 Septal formula;, 174. 

 SfriatoporidiB, 205, 206, 232, 237, 244, 



245. 

 Serous Inyer, of blastoderm, 16. 

 Sertularia, 90, 95. 127. 

 Scrtuiariadce, 77. 92, 95. 

 Sertularidce, general characters of, 

 79, 90 ; developir.ent of, 56 ; cceno- 

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

 hvdrotliecje of, 35, 92 ; polypites of, 

 92 ; tentacles of, 93 ; nematophores 

 of, 95 ; gonoblasiidia of, 46 ; gono- 

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

 distribution of, 126—8. 

 Silurian Corals, 243. 

 Size, of Ca'lenterata,(i\ of Uydroxoa, 



28 ; of Actiiiuzoa, 140. 

 Smilotrochi.s, 246. 

 Smiihia, 244. 

 Siilmnstrtra, 241. 



Somatic cavity, of Ccelentcrata, 3. 10, 

 17; of Uydi(:'x.oa, 17, 29 31 ; vii Ac- 

 tinoxoa, 17. 141, 144—7. 

 Somatic chambers, of Actinozoa, 134, 



146. 

 Somatic fluid, 6. 



Somatocyst, of Cah/copkoj-ida!, 96. 

 Spermaria, of Hydroxoa, 40, 50 ; of 



Actinozua, 169. 

 Spermatozoa, 15: of Hydrozoa, 50; 



of Actinoxoci, 169 

 Sphenotrochus, ::„p. 

 S/jhiPronectes, 98, 99. 

 Sphceronectidcc, 100. 

 Spicuiar corallnm, 160, 162, 209. 212. 

 Spicules. of ^/r2/owi</iS and Zoanthidce, 



160; oi Gorfioriidte, 161. 

 Spiral cnidic. 150, 151. 

 Spotiii<ipki//lu?n, 244 

 Sporosac, 40, 45. 

 Spurious ccenenchyma, 205. 

 Staun'a, 214, 244. 

 Stauridce, 215, 237, 244, 245- 

 Slam-idia, tentacles of, 87 ; gono- 



jihores of, 88, 89. 

 SUenstrupia, 65. 

 Steganophthalniata, 120. 

 Steiloria, 246. 

 Sleiiostomatii, 219, 230 

 Stt'phanocicn'ta., ziC). 

 Slcpltanoniia, 108. no, 112. 

 SlcpliaTumiiddiC, 1 13. 

 Stt'/j/ianop/iyllia, 240. 

 Stercopsamnia, 247. 

 Stinging powers, of Ccclenternta, 5. 

 Stomach, of Actinozua, 132, 141, 144 

 Stomachal filaments, oiLuccrnaridce, 

 124. 



Stomatodendrn, of Rhizosiomidce, 49. 



Stomobracltium, fission of, 63. 



Strebla, 151 



SlreptelaS'na, 244. 



Strobihi, 66. 



Slrombodes, 244. 



Stijlaxis, 245. 



Sti/loia, 239, 245. 



Styldccen/a, 240. 



Stylocyaihus, 246. 



Stylophora. 174, 240. 



Sti/lop/ion'dcc, 207, 237, 247. 



S/ylosmilia, 239. 



Successive development, of ap])en- 

 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 Phy.-o- 

 phoridce, 107 ; of Medusidte, 115— 6. 



SytnphytUa. 241. 



Synapticulae, 155, 203. 



Syndendriiim. o( Hkizostamidce, .59. 



Synhcelia, 246. 



Syringopliyllum. 238. 



Syririgopora, 238. 



Tabulata. 158, 161, 205, 237, 241. 



Tabula;, 156. 



Tactile organs, of Hydrozoa, 40 ; of 

 Ctenophora, i63. 



Tatunya, 126. 



Tangled cnidae, 150, 151. 



Tegumentary organs, of Hydrozoa, 

 34 ; of Actinozoa, 149. 



Tckstho, 159, 209. 



Tentacles, of Hydrozoa, 32 ; of .^.c- 

 tinozoa, 148 ; of Hydrides, 20 ; cf 

 Corynidcs, 32, 85; of Sertularidn- , 

 32, 93 ; of Calycophoridce, 32, 33 ; 

 of Fliysophorida, 32, 33, in ; of 

 Medusidce, 32, 117; of Lieccrria- 

 ridee, 32, 121, 125 ; of Zoantharia, 

 148, 199 ; of Alcyonaria, 148 ; of 

 Ctenophora, 225. 



Tertiaiy Corals, 247. 



Tlialassiatithus, tentacles of, 200. 



Thamnastrcea, 239. 



Thaumantiadce , 120. 



TliauDiantias, 63, 129. 



Thpca, 155. 



Tliecia, 244. 



Thccidce, 205. 237, 242, 244. 



Thccocyathus. 246. 



ThecosmtUii, z^c). 



T/iecosfc^ites, 244. 



Thread-cells, ol Coclenterata, 3 ; of 

 Physaiia, 5 ; of hydra, 20 ; of yfJc 

 tiuuzoa, 150. 



Tichaslrcea, 247. 



Ti'ue, relations to, of Hydrozoa, 130; 

 of Actinozoa, 236. 



Tissue secretion, 153. 



Vrachynema, 60, 117. 



Trachynemidce, 119, 120. 



