INDEX. 
Acuodds, a genus of fossil sbarks, i. 
288. 
Actinocrinites, 30-dactylus, Miller's 
restoration of, i. 429. 
Adapis, character and place of, i. 82. 
Agassiz, iiis recognition of the scales ol 
fislies in coprolites,i. 191 : on causes 
of the death of fishes, i. 122 ; on ori- 
gin of cololitea, i. 200 i on Claris tur- 
tle, i. 257 ; his classification of fishes, 
i. 268 ; documents consigned to him 
by Cuvier, i. 267 ; his now orders of 
fishes, i. 269, 270; geological re- 
sults established by, i. 272, 273 ; 
his new arrangement of Monte Bolca 
fishes, i. 285 ; his discoyeiy of be- 
letnnites with ink bags, i. 374 ; on 
the bilateral structure of radiated ani- 
mals, i, 415. 
Agnostus, a genus of trilobites, i. 391. 
Aichstadt, pterodactyles found at, i. 
221 . 
Aix, fossil fishes of, i. 285. 
Allan, Mr., his paper on Antrim be- 
leranites, i. 377. 
Amber, fossil resin from lignite, i. 520. 
Amblypterus, fossil genus of fishes, i. 
278. 
Ammonites, formed by cepltalopodotts 
mollusks, i. 333 ; characteristic of 
diffeient fonnations, i. 333 ; geolo- 
gical distribution of, i. 334 ; gcogra- 
pbical ditto, i. 335 ; exlentand num- 
ber of species, i. 334 ; size ot, i. 334 ; 
sub-genera of, i. 334 ; shell com- 
posed of three parts, i. 336 ; exter- 
nal shells, 1. 337, 338 ; outer cham- 
ber contained the animal, i. 337 — 
339 ; double functions of shell, i. 
338 ; contrivances to strengthen 
shells,!, 339 — 344; ribs, architectu- 
ral disposition of, i. 341 ; transverse 
plates, useoftheirfoliated edges,!. 344 
— 349 ; compound internal arches, i. 
349 ; siphuncle, organ of hydraulic 
adjustment, i. 350, 351 ; siphuncle, 
occasional state of preservation, i, 
351, 352 ; siplnmrle, placed diil'e- 
reiitly from tnat of nautili, i. *353; 
siphuncle, Ur. Piont’s analysis of, 
i. 352 ; air cliambets, more complex 
in ammonites than in nautili, i. 350; 
ammonites, how different from nau- 
tili, 353 ; Von Bitch’s theory of, i. 
352 ; uses of lobes and saddles in, 
i. 354; concludingobservationsupon, 
i. 3-35 — 357 ; probable place of heart 
in, ii. 58. 
.\narrhicas, palatal teeth of, i. 281. 
Animals, final cause of their creation, 
i. 101 ; lower classes of, predomi- 
nate in earlier strata, i. 115 ; extinct 
races, how connected with existing 
species, i, 581 ; causes of their sud- 
den destruction, i. 122 ; small num- 
ber adapted for domestication, i. 100 ; 
terrestrial, how buried in strata of 
fresh water and marine formation, i. 
128. 
Animal enjoyment, one great object of 
creation, i. 293, 301. 
Animal kingdom, four great divisions of, 
coeval, i. 61 ; early relations of,i. 87. 
Animal life, extent of upon our globe, 
i. 102; progressive stages of,i. 115; 
remains of in secondary strata, i. 72. 
Animal remains, most instructive evi- 
dences in geology, i. 128 ; preserved 
chiefly by agency of water, i. 126. 
Annelidans, fossil remains of, i. 387. 
Anning, Miss, her discovery of ink bag 
wlllnn horny sheath of belenmite, i. 
374 ; her discoveries at Byrne Regis, 
passim ; her obseiv.ations on connec- 
tion of lignite with pentacrinitesnear 
Lyme, i. 437 ; her discovery of fossil 
pens and ink. bags of Loligo, i. 304. 
Anoplotherium, character and place of, 
Anslice, Mr. W., his discovery of in- 
sects in coal fotmation, i. 405 ; me- 
galichthys, Ac. found in Coalbrook 
Dale, by, ii. 43. 
Ant eater, humerus like that ot mega- 
thtriiim, i. 154. 
Antbracotberium, character and place 
ot, i. 82. . . , 
Apiocrinites, or pear encnnite. Miller s 
restoration of, i. 428. 
Arachnidans, two great families of, 
found fossil, i. 405. 
Arago, M.. oti expenditure of ram 
water, i. 5-57 ; on Arlesian wells in 
France, i. 564. 
