11 () 
INDEX. 
D'Alton, liis figures of megatherium, i. 
142. 
Darmstadt, remains of mammalia in 
museum at, i. 91. 
Darwin, Sir. €., megatherium found by, 
ii. 20 ; his observations on the Cor- 
dilleras of Chili, i. 549. 
Daubeiiy, Dr., on cause of thermal 
springs, i. 570 ; on indivisibility of 
ultimate particles of matter, i. 576. 
Days, supposed to imply long periods, 
i. 17. 
Dax, shells found at, i. 357. 
Death, sudden, desiiable for irrational 
animals, i. 130. 
Dekay, Dr., discovered coprolites in 
New Jersey, i. 190. 
De la Ueclie, his belief in successive 
creations of new species, i. 55 ; his 
figures of ichthyosauri, i. 176; on 
dilTercnt specific gravity of shells, i. 
302 ; observations on living polypes 
of caryophyllia, i. 444 ; observations 
on genera of corals in transition 
rocks, i. 445. 
Deluge, mosaic stratified rocks not pro- 
duced by, i. 16. 
Depression, proofs of in I. Portland, i. 
496. 
Deshayes, his division of tertiary strata, 
i. 78. 
Desnoyers, M., on Faluus of Tour- 
raine, i. 90. 
Desmarets, memoir on fossil crusta- 
ceans, i, 388. 
Detritus, origin of strata from, i. 42. 
Development, theory of disproved by 
geological phenomena, i. 54 ; theory 
of opposed by Cuvier, i. 87 ; defini- 
tion of, i. 585. 
Dillvvyn, Mr., his paper on tracheli- 
pods, 298, 301. 
Diluvium, animals immediately pre- 
ceding the formation of, i. 95. 
Diiiothcrium, largest of lenestrial mam- 
malia, i. 92, 598 ; found at Epplc- 
sheim, in miocene strata, i. 135, 136; 
description of by Kaup, i. 136; oc- 
curs in France, Bavaria and Aus- 
tiia, i. 136 ; molar teeth of like 
tapirs, i, 136; giganteum, eighteen 
feet long, i. 1.36 ; shoulder blade of, 
like that of a mole, i. 136; uses of 
tusks in the lower jaw of, i. 138 ; 
molar teeth of resomble tliose of ta- 
pirs, i. 137 ; an aquatic herbivorous 
animal, i. 137, 139; adapted to a 
lacustrine condition of the earth, i. 
139; localities and description of, ii. 
18 ; proboscis and claws of, ii. 19. 
Dirt bed, soil of subterraneous forest in 
Portland, i. 495, 496. 
Disturbing forces, beneficial results of, 
i. 539—541 , 548. 
D’Orbigny, M. his classification of ce- 
phalopodous mollusks, i. 382 ; trilo- 
biles and shells found in the Andes 
by,i. 389. 
Draco volans, has no trae wings, i. 
225. 
Dufrenoy, on iron mines in the Pyre- 
nees, 1 . 549. 
Dujardin, new class of rhizopodes dis- 
covered by, ii. 64. 
Dumfries, fossil footsteps near, i. 259. 
Duncan, Dr., his discovery of fossil 
footsteps near Dumfries, i. 259. 
Durdham Down, remains of reptiles at, 
i. 115. 
Durham, salt springs in coal formation 
near, i. 72. 
Dykes, intersect strata of every age, i. 
48 ; gradations of from lava to gra- 
nite, I. 48 ; various crystalline rocks 
composing, ii. 5 ; changes produced 
by, on adjacent rocks, ii. 9. 
Dynamics, geological, extent of, i. 36. 
Earth, distribution of the materials of, 
i. 5 ; theory of, much advauced, but 
not yet perfect, i. 12 ; two distinct 
branches of its history, i. 34 ; origi- 
nally fluid from heat, i. 39; advan- 
tageous dispositions of its materials, 
i. 93. 
Earthquakes, beneficial agency of in 
the economy of the globe, i. 540. 
Echidna, has furcula and clavicles like 
ornithorhynchas, i. 182. 
Echinidans, geological extent of, i. 
415. 
Echinoderms, fossil, bilateral slrueture 
of, i. 415. 
Egerlon, Sir Philip, his discoveries near 
Newcastlc-under-Line, i. 276 ; on 
mechanism of atlas and cervical ver- 
tebrae of ichthyosaurus, ii. 24 — 26. 
Eggs, fossil, of aquatic birds, i. 86. 
Elements, identity and functions of, i. 
36 ; proofs of design in, i. ,57 1 ; ever 
regulated by same laws, i. 577 ; 
primordial adaptations of, i. 578 ; 
adaptation of to vegetables and ani- 
mals, i. 579. 
Elevation, general history of, h. 4 ; 
dry lands formed by, i. 43 ; proofs 
of in 1. Portland, i. 495, 496. 
Elevations, number observed by Elie 
