120 



INDEX. 



tilus, i. 326 ; ditto in ammonites, i. 

 351 ; ditto in belemnites, i. 381. 



Hyenas, bones collected by, in caverns, 

 i. 94. 



Hylaeoskurus discovered by Mr. Man- 

 tell, i. 241 ; peculiar character of, i. 

 241. 



Hythe, large haraite found at, i. 368. 



Icthyodorulites, or fossil spines, i. 288 ; 

 uses and variety of, i. 290. 



Ichthyosaurus, geological extent and 

 chief localities of, i. 168 ; curious 

 structure of, i. 169 ; number of spe- 

 cies, i. 169} head partaking of the 

 character of crocodiles and lizards, i. 

 171 ; jaw^, length of, i.l 71 ; teeth, cha- 

 racter and number of, i. 171 ; how 

 differing from crocodiles,!. 171 ; con- 

 trivances for replacing, i. 172 ; eyes, 

 magnitude of, i. 173 ; eyes, micro- 

 scopic and telescopic properties of, i. 

 173 ; eyes, bony sclerotic of, i. 174, 

 175 ; jaws, composed of many thin 

 plates, i. 175; jaw, lower, contri- 

 vances in, i. 176, 177; vertebrae, 

 number of, i. 177; vertebrae con- 

 structed like those of fishes, i. 

 178; ribs structure of, and to what 

 purpose subservien^, i. 180; sternum 

 like that of ornithorhynchus, i. 181 • 

 paddles, anterior, like those of 

 whales; posterior, like those of orni- 

 thorhynchus, i. 182, 183 ; concluding 

 remarks upon, i. 185, 186 ; intestinal 

 structure of, i. 187 ; skeleton of, con- 

 taining cropolite, i. 191 ; small in- 

 testines spiral, like that of sharks and 

 rays, i. 193 ; final cause of spiral 

 intestinal structure, i. 195 ; skin of 

 preserved, ii. 22 ; mechanism of atlas 

 and cervical vertebrje of, ii. 24 — 26. 



Igneous rocks, various phenomena of, 

 ii. 5—9. 



Iguana, modern, habits of, i. 242 ; den- 

 tition of, i. 248. 



Iguanodon, discovered by Mr. Mantell, 

 i. 240; remains of, where found, i. 

 241 ; a gigantic herbivorous reptile, 

 i. 241 ; teeth like those of the mo- 

 dern iguana, i. 241 ; the largest of 

 known fossil reptiles, i. 241, 244 ; 

 climate indicated by remains of, i. 

 243 ; teeth, peculiar character of, i. 

 245 — 248 ; bony horn on the nose of, 

 i. 244 ; food of, probably tough ve- 

 getables, i. 246. 



Indusiae, lossil, in fresh water formation 

 of Auvergnti, i. 118. 



Infusoria, Ehrenberg's observations on, 

 i. 446 — 448 ; number of species de- 

 scribed, i. 446 ; their powers of repro- 

 duction, i. 446 ; their manners of in- 

 crease, i. 447 ; universal diffusion of, 

 i. 448 ; known extent of living and 

 fossil species, i. 610^—612. 



Injection of igneous rocks at various 

 periods, ii. 6. 



Ink bags,recent and fossil of Ioligo,i.303. 



Insects, fossil in carboniferous strata, 

 409 ; wing covers of, at Stonesfield, 

 i. 411 ; Count Munster's collection 

 of from Solenhofen, i. 411 ; many 

 fossil genera in tertiary strata, i. 412 ; 

 found at Aix by Mr. Murchison and 

 Mr. Lyell, i. 610. 



Iron, ore abundant in coal formation, i. 

 65 ; quantity of, annually made in 

 England and Wales, i. 530 ; secreted 

 by living infusoria, i. 611. 



Isle of Wight, iguanodon found in, i. 

 242. 



Jaeger, Professor, has found coprolites 



in Wirtemberg, i. 190 ; his work on 



fossil plants, i. 490. 

 Jardine, Sir W., fossil footmarks found 



by, i. 259. 

 Juli, supposed fir cones, are coprolites, 



i. 198. 



Kaup, Professor, notice on the foosteps 

 of chirotherium i. 264 ; his descrip- 

 tion of fossil mammalia at Epple- 

 sheim, i. 91 ; his description of di- 

 notherium, i. 136, 603. 



Kersten, Professor, his discovery of 

 pyrogenous crystals of felspar, i. 598. 



Kepler, his prayer, i. 10. 



Killery, cemetery in a sand bank at, i. 

 104. 



King, Captain, animal of spirula found 

 by, i. 362 ; serolis found by, i. 392. 



Kcinig, Mr., his account of human 

 skeleton in British Museum, from 

 Guadaloupe, i. 104. 



Lamantin, remains of, in pliocene pe- 

 riods, indicate a warm climate, i. 

 92. 



Lamarck, his two sections of tracheli- 

 pods, i. 298 ; on geological effects of 

 microscopic shells, i. 385 ; his no- 

 tice of suckers of encrinus, i. 440 ; 

 theory of transmutation associated 

 with development by, i. 585. 



Lartet, M., animals at Simorre des- 

 cribed bv, i. 601. 



