4o6 



INDEX. 



Screw-pines, 230. 



Scutella, 311; suhrotunda, 312. 



Sea-cows (see Sirenia' . 



Sea-lilies (see Crinoidea). 



Sea-lizards (see Enaliosaurians). 



Seals, 322. 



Sea-mats and Sea-mosses (see Polyzoa). 



Sea-slirubs (see Gorgonida?). 



Sea-urchins (see Echinoidea). 



Sea-weeds, SO, SI, S3, 97, 136, 164, 261. 



Secondary period, 44 



Sedimentary rocks, 15. 



Semnopithecus, 322, 331. 



Septaria, 31. 



Seqiwia, 306, 809, 310; Cov.ttsim, 309; 

 gigantea, 309; Langsdorffii, 309. 



Serolis, S4. 



Serpents (see Ophidia). 



SerpuUtes. 123. 



Sewalik Hills (see Siwalik Hills). 



Sheep, 355. 



SheU-sands, 19. 



SigiUaria, 168, 169 ; Groeseri, 16S. 



SigiUarioids, 136, 16S, 170, 196. 



Silicates, infiltration of the shells of For- 

 aminifera by, 34, 74. 



Sniceous rocks, 20, 32. 



Siliceous Sponges, 265. 



Silicification, 13, 14. 



Silurian period (see Lower Silurian and 

 Upper Silurian , 90-114, 115-132. 



Sivwsaurus, 219; GaiUardoti, 219. 



Siphonia, 264 ; ficus, 265. 



Siphonostomatous Univalves, 237, 271, 293. 



Siphonotreta, 110. 



Sirenia, 299, 320 ; of the Eocene, 299 ; of 

 the Miocene, 315. 



Siren lacertina, 200. 



Sivatherhim, 318 ; gignnteum, 319. 



Siwalik Hills, Miocene strata of, 307. 



Skiddaw Slates, 101. 



Sloths, 315, 349-351. 



Smilax, 308. 



Smithia, 173. 



Snakes (see Ophidia). 



Soft Tortoises, 296. 



Solarium, 271. 



Solenhofen Slates, 228. 



SoUtaire, 346, 348. 



Spalacotheriv.m, 254. 



Spatangu-s, 311. 



Sphcerospongia, 139. 



Sphagodus, 130. 



Spkenodon, 218. 



Sphenopteris, 136, 165, 196. 



Spiders of the Coal-measures, 181. 



Spider-sheUs. 237. 



Spindle-shells, 237. 



Spiri/era, 125, 147, 184, 198, 234; crispa, 

 127; disjuncta, 147; hysterica, 126; 

 mucroiMta, 147; Xiagarensi^, 127; ros- 

 trata,-235; sculpt iU^,\-i7 ; trigonali^,lSo. 



Spiriferidce, 147. 



Spirophyton cauda-Galli. 135, 164. 



Spiwrbis, 123, 143, 178 ; Arkonensis, 144 ; 

 Carbonanus, 178; laxus, 144; Lewisii, 

 123 ; omphalodes, 144 ; spinulifera, 144. 



Spirulirostra, 312. 



Spondylus, 269 ; spinosus, 270. 



Sponges, of the Cambrian, 81 ; of the 

 Lower SUurian, 98 : of the Upper Silu- 

 rian, 119 ; of the Devonian, 139 ; of the 



Carboniferous, 171 ; of the Permian, 

 197; of the Trias, 209; of the Jurassic, 

 230; of the Cretaceous, 264, 265. 



Spongdla, 197. 



Spongillopsis, 197. 



SpongophijUum, 173. 



Spore-cases, of Crj^togams in the Ludlow 

 rocks, lis ; in the Coal, 163. 



Squirrels, 322. 



Stajonolepi-s, 218. 



Staircase-shells, 271. 



Stalactite, 21. 



Stalagmite, 21. 



Star-corals, 231. 



Star-flshes, 105, 120, 210. 



St Cassian Beds, 205, 206. 



Stephanophiillia, 266. 



Stereognathus, 253, 254. 



Sfigmaria, 169; ficoides, 169. 



Stonesfleld Slate," 227 ; Mammals of, 253. 



Strata, contemporaneity of, 44. 



Stratified rocks, 15-18. 



Streptelasma, 105. 



Streptorhyncinis, 198. 



Stromatopora, 98, 99, US, 139 ; rugosa, 99; 

 tuherculata, 140. 



Strombodes, 119; pentagonus, 104. 



Strombus, 271. 



Strophalosia, 198. 



Strophodus, -Ibb. 



Strophomena, 109, 110, 125, 147, 184; 

 altcrnata, 110 ; deltoidea, 109 ; JiUtexta, 

 110 ; rhoinboidalis, 147, 148; subplana, 

 127. 



Sub-Apennine Beds, 325. 



Sub-Carboniferous rocks, 158, 161. 



Succession of life upon the globe, 367-374. 



Suida, 302, 317, 329. 



Sulphate of lime, 22. 



Sus Erymanthius, 317; scrofa, 354. 



SynaMrcea, 209. 



Synhelia Sharpeana, 260. 



Synocladia, 198 ; virgulacea, 198. 



Syringopora, 119, 173 ; ramulosa, 174. 



Tabulate Corals, 104 ; of the Lower Silu- 

 rian, 105 ; of the Upper Silurian, 119; 

 of the Devonian, 142; of the Carbon- 

 iferous, 172; of the Permian, 197. 



Talpa Europcea, 336. 



Tap'iridce, 300. 



Tapirs, 300. 



Tapiriis Arvenun^is, 327. 



Taxocrinus tiiberculatus, 122. 



Taxodium, 262, 308, 310. 



Teleosauriis, 251. 



Teleostean Fishes, 150; of the Cretaceous, 

 276. 



Telerpeton Elginense, 218. 



Tellina proxima, 338 



Tentaculites, 129, 148 ; ornatus, 129. 



Terebra, 293. 



Terebratella, 268 ; Astienana, 268. 



Terebratula, 184, 234 ; digona, 235; elon- 

 gata, 168; hastata, 185; quadrifida, 

 235 ; sph(eroidalis, 235. 



Terebratiilina, 268 ; caput-serpentis, 268 ; 

 striata, 268. 



Termites, 311. 



Terrapins, 2S0, 296. 



Tertiary period, 44, 284-287. 



Tertiary rocks, classification of, 284-287. 



