INDEX. 
119 
tions of land, i. 42 ; not tlie sole 
cause of the consolidation ot stratified 
rocks, i. 56. 
Henderson, on plants in Surlurbrand of 
Iceland, i. 510. 
IJenslow, I'rofessor, on buds of cycas 
i-evoluta, i. 500. 
ll^ricart dc TUui^, illustration of Arte- 
sian wells by, i. 562, 565. 
Ilerschel, Sir r.F.W., ranks gcologyuext 
to astronomy, i. 10; on connectuni 
between scienco and religion, i. 590. 
Ilessberg, footsteps in sandstone at, i. 
263. 
Hibberl, Dr., his discoveries near Edin- 
burgh, i. 275, 276. 
Hippopotamus, structure of tusks of, i. 
149. , , . 
Hitchcock, Professor, his discovery of 
footsteps of birds iu Connecticut, i. 
86; ditto, ii. 39, 40; on geological 
evidences of a Creator, i. 586 ; on 
consistency of geological phenomena 
with Mosaicaccountof crcation,i.587. 
Hoer in Scania, coal in secondary 
strata of, i. 491. 
Hoffmann, Professor, on sonree^of mi- 
neral waters at Pyrmonl, i. 570. 
Home, Sir Piveiard, on spinal canal of 
icthyosauros, i. 179. 
Hook, Hr., his theory respectmg the 
motions of nautilus, i. 331. 
Hopkins, Mr., on laws that have regu- 
lated the disturbances of the globe, 
i. 540 ; on production of springs by 
faults, i. 560. , ■ , 
Human hones, found in no geological 
formations precerling the actual era, 
i. 103 ; often interred in caves con- 
taining remains of more ancient ani- 
mals, i. 105; found in consolidated 
sand at (juadaloupe, i. 104; how 
mixed with bones of ancient and 
modern quadrupeds, i. 105 ; in ca- 
verns near Liege, 597. 
Hutton, Hr., his theory of the formaUon of 
stiatiBed rocks, i. 44 ; of veins, i. 551 . 
H utton, j\lr. , his discoveries of vegetable 
structure in coal, 1. 455. 
Ilybodonts, extent of, i, 267. 288. 
Hybodus, i. 283 
Hybodus reticulatus, i. 289. 
Hydraulic action, of siphunclo in nau- 
tilus, i. 326 ; ditto in ammonites, i. 
351 ; ditto in belemniles, i. 381, 
Hyenas, bones collected by, in caverns, 
i. 94. 
Hylaeosaurus discovered by hlr. Mau- 
tell, i. 241 ; peculiar character of, 
i.241. 
Hythe, large hamlte found at, i. 368. 
Ictliyodorulites, or fossil spines, i, 288 ; 
uses and variety of, i. 290. 
Ichlliyosaurus, geological extent and 
chief localities of, i. 168 ; curious 
struct ure of, i. 169 ; number of spe- 
cies, i. 169 ; head, partaking of the 
character of crocodiles and liaards, i. 
171 ; jaw, length of, i. 171 ; teeth, cha- 
racter and number of, i. 171 ; huw 
difl'ering from crocodiles, i. 171 ; con- 
trivances for replacing, i. 172 ; eyes, 
magnitude of, i. 17.3; 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; vertebra-', 
number of, i. 177 ; vertebral con- 
structed like those of fishes, i. 
178 ; ribs, structure of, and to what 
purpose subservient, i. 180; sternum 
like that of ornithoihyncbus, i. 181 ; 
paddles, anterior, lito those ot 
whales ; posterior, like those of onii- 
thorhynchus, i. 182, 183 ; concluding 
remarks upon, i. 1 85, 186; inlestinul 
structure of, i, 187 ; skeleton of, con- 
taining coprolite, I. 191 ; small in- 
testine 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 vertebra; 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, whore 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 indicatetl by remains of, i. 
243 ; teeth, peculiar character of, i. 
245 248 ; bony horn on the nose of, 
i.244 ; food of, probably tough vege- 
tables, i. 246. 
Indiisite, fossU in fresh water formation 
of Auvergoe, i. 118. 
Infusoria, Khrenberg’s observations on, 
j 445 448 ; number of species de- 
scribed, i. 446 ; tlu ir powers of repro- 
duction, i.4 I6; their manners of in- 
crease, i. 447 ; universal diffusion of, 
i 448 ; found fossil, i. 599. 
Injection of igneous rocks at various 
pgfiods, li. 6. 
Ink bags, recent and fossil of loli^,i.303. 
