406 



INDEX. 



Screw-pines, 230. 



Scutella, 311 ; subrotunda, 312. 



Sea-cows (see Sirenia). 



Sea-lilies (see Crinoidea). 



Sea-lizards (see Enaliosaurians). 



Seals, 322. 



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



Sea-shrubs (see Gorgonidse). 



Sea-urchins (nee Echinoidea). 



Sea-weeds, 80, 81, 83, 97, 136, 164, 261. 



Secondary period, 44 



Sedimentary rocks, 15. 



Semnopithecus, 322, 331. 



Septaria, 31. 



Sequoia, 306, 309, 310; Couttsice, 309; 



gigantea, 309 ; Langsdorffii, 309. 

 Serolis, 84. 



Serpents (see Ophidia). 

 Serpulites, 123. 



Sewalik Hills (see Siwalik Hills). 

 Sheep, 355. 

 Shell-sands, 19. 



Sigillana, 168, 169 ; Groeseri, 168. 

 Sigillarioids, 136, 168, 170, 196. 

 Silicates, infiltration of the shells of For- 



aminifera by, 34, 74. 

 Siliceous rocks, 20, 32. 

 Siliceous Sponges, 265. 

 Silicification, 13, W. 

 Silurian period (see Lower Silurian and 



Upper Silurian), 90-114, 115-132. 

 Siinotaurus, 219; Gaillardoti, 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. 

 Sivatherium, 318 ; giganteum, 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. 

 Solitaire, 346, 348. 

 Spalacothenum, 254. 



Sphcerospontjia, 139. 



Sphagodus, 130. 



Sp/ienodon, 218. 



Sphenopteris, 136, 165, 196. 



Spiders of the Coal-measures, 181. 



Spider-shells, 237. 



Spindle-shells, 237. 



Spiri/era, 125, 147, 184, 19S, 234 ; crispa, 

 127 ; disjuncta, 147 ; hyuterica, 126 ; 

 mucronata, 147; Niagarensis, 127; ros- 

 trata.,235; sculptilis,Ul ; trigonalis,lS5. 



Spiriferidce, 147. 



Spirophyton cauda-Galli, 135, 164. 



Spirorbis, 123, 143, 178 ; Arkonemds, 144 ; 

 Carbonanus, 178; laxus, 144; Lewtsii, 

 123 ; omphalodes, 144 ; spinuhfera, 144. 



Spinihrostra, 312. 



Spondylus, 269 ; spinosus, 270. 



Sponges, of the Cambrian, 81 ; of the 

 Lower Silurian, 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. 



Spongilla, 197. 



Spongillopsis, 197. 



Spongophyllum, 173. 



Spore-cases, of Cryptogams in the Ludlow 

 rocks, 118 ; in the Coal, 163. 



Squirrels, 322. 



Stagonolepte, 218. 



Staircase-shells, 271. 



Stalactite, 21. 



Stalagmite, 21. 



Star- corals, 231. 



Star-fishes, 1<>5, 120, 210. 



St Cassian Beds, 205, 206. 



Stephanojihijllta, 266. 



Sterengnatfius, 253, 254. 



Stigmaria, 169 ; ficoides, 169. 



Stonesfield Slate, 227 ; Mammals of, 253. 



Strata, contemporaneity of, 44. 



Stratified rocks, 15-18. 



Strtptelciftma, 105. 



Streptorhynchus, 198. 



Stromatopora, 98, 99, 118, 139 ; rugosa, 99; 

 tuberculata, 140. 



Strombodes, 119; pentagonus, 104. 



Strombus, 271. 



Strophalosia, 198. 



Stroplwdus, 255. 



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

 alternata, 110 ; deltoidea, 109 ; Jilitcxta, 

 110; rhomboidalis, 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. 



Sits Erymanthius, 317 ; scrofa, 354. 



Synastrata, 209. 



Synhelia Sharpeana, 266. 



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. 



Tapiridce, 300. 



Tapirs, 300. 



Tapirus Arvernensis, 327. 



Taxocrinus tuberculatus, 122. 



Ta.xodi.um, 262, 3u8, 310. 



Teleosaurus, 251. 



Teleostean Fishes, 150; of the Cretaceous, 

 276. 



Telerpeton Elginense, 218. 



Tellina proxima, 338. 



Tentaculites, 129, 148 ; ornatus, 129. 



Terebra, 293. 



Terebratella, 268 ; Astieriana, 268. 



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

 gata, 168 ; hastata, 185 ; quadrijida, 

 235 ; sphcuroidalis, 235. 



Terebratulina, 268 ; caput-serpentis, 268 ; 

 striata, 268. 



Termites, 311. 



Terrapins, 280, 296. 



Tertiary period, 44, 284-287. 



Tertiary rocks, classification of, 284-287. 



