406 



INDEX. 



Screw-pines, 230. 



Seutella, 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 Gorgonidae). 



Sea-urchins (see 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 ; Langsdorjfti, 309. 



Scrolls, 84. 



Serpents (see Ophidia). 



Serpulites, 123. 



Sewalik Hills (see Siwalik Hills). 



Sheep, 355. 



Shell-sands, 19. 



Sigillaria, 168, 169 ; Grceseri, 168. 



Sigillarioids, 136, 168, 170, 196. 



Silicates, infiltration of the shells of For- 

 aminifera by, 34, 74. 



Siliceous rocks, 20, 32. 



Siliceous Sponges, 265. 



Siliciflcation, 13, K. 



Silurian period (see Lower Silurian and 

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



Simosaurus, 219 ; Gaillardoti, 219. 



Siphonia, 264 ; ftcus, 265. 



Siphonostomatous Univalves, 237, 271, 293. 



Siphnnotreta, 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. 



Spalacotherium, 254. 



Spatangus, 311. 



Sphcerospongia, 139. 



Sphagodus, 130. 



Spkenodon, 218. 



Sphenoptens, 136, 165, 196. 



Spiders of the Coal-measures, 181. 



Spider-shells, 237. 



Spindle-shells, 237. 



Spirifera, 125, 147, 184, 19S, 234 ; crispa, 

 127; disjuncta, 147; hysterica, 126; 

 mucronata, 147; Niagarensis, 127; ros- 

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



Spiri/eridce, 147. 



Spirophyton cauda-Gatti, 135, 164. 



Spimrbis, 123, 143, 178 ; Arkonensis, 144 ; 

 Carbonanus, 178; laxus, 144; Lewtsii, 

 123 ; omphalodes, 144 ; spinulifera, 144. 



Spiruhrostra, 31 2. 



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. 

 jilla, 197. 

 'illopsis, 197. 

 . . hyllum, 173. 



Spore-cases, of Cryptogams in the Ludlow 

 rocks, 118 ; in the Coal, 163. 



Squirrels, 322. 



Stagonoleplx, 218. 



Staircase-shells, 271. 



Stalactite, 21. 



Stalagmite, 21. 



Star-corals, 231. 



Star-fishes, 105, 120, 210. 



St Cassian Beds, 205, 206. 



Stephanophtjllia, 266. 



Stereognathus, 253, 254. 



Stigmaria, 169 ; ficoides, 169. 



Stonesfield Slate, 227; Mammals of, 253. 



Strata, contemporaneity of, 44. 



Stratified rocks, 15-18. 



Streptelaama, 105. 



Streptorhynchus, 198. 



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

 tuberculata, 140. 



Strombodes, 119; pentagonus, 104. 



Strombus, 271. 



Strophalnsia, 198. 



Strophodus, 255. 



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

 alternata, 110 ; deltoidea, 109 ; filitexta, 

 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. 



SMS Erymanthius, 317 ; scrofa, 354. 



SynastroM, 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. 



Taplridce, 300. 



Tapirs, 300. 



Tapirus Arvernensis, 327. 



Taxocrimis tuberculatus, 122. 



Taxodium, 262, 3u8, 310. 



Teleosaurus, 251. 



Teleostean Fishes, 150; of the Cretaceous, 

 276. 



Telerpeton Elginense, 218. 



Tellina proximo,, 338. 



Tentaculites. 129, 148 ; ornatus, 129. 



Terebra, 293. 



Terebratella, 268 ; Astieriana, 268. 



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

 gata, 168 ; hastata, 185 ; quadrifida, 

 235 ; sphceroidalis, 235. 



TerebratuUna, 268 ; caput-serpentis, 268 ; 

 striata, 268. 



Termites, 311. 



Terrapins, 280, 296. 



Tertiary period, 44, 284-287. 



Tertiary rocks, classification of, 



