116 



INDEX. 



secondary series, i. 490, 491 ; num- 

 ber and extent of recent and fossil 

 species, i. 491 ; leaves fossil in oolite 

 of Yorkshire and at Stonesfield, i. 

 492 ; in coal formation of Bohemia, i. 

 492 ; habit and structure of, i. 492 ; in- 

 termediate character of, i. 493; fossil 

 on the coast of Dorset, i. 494 ; pecu- 

 liarities in structure of trunk of, i. 

 494, 496 ; mode of increase by buds, 

 i. 499 ; link supplied by the disco- 

 very of, i. 502. 



Cycadites, once natives of England, i. 

 495 ; mycrophyllus, microscopic 

 structure of, 497 — 541 ; megalophyl- 

 lus, buds in axillae of scales, i. 500 ; 

 resemblance of fossil and living spe- 

 cies, i. 501. 



Cycas revoluta, buds on trunk of, i. 

 499 ; circinalis, height of, i. 494. 



Cycloidean order of fishes, i. 270. 



Cypris, microscopic shells of, in Weal- 

 den formation, i. 118 ; in coal for- 

 mation near Edinburgh, i. 275. 



Dapedhim, scales of, i. 282. 



D'Alton, his figures of megatherium, i. 

 142. 



Darmstadt, remains of mammalia in 

 museum at, i. 91. 



Darwin, Mr. C., megatherium found by, 

 ii. 20; his observations on the Cor- 

 dilleras of Chili, i. 549 ; new fossil 

 animals found in S. America by, i. 

 603. 



Dasyurus, fossil, in Auvergne, i. 618. 



Daubeny, 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, certain, desirable for irrational 

 animals, i. 130. 



Dekay, Dr., discovered coprolites in 

 New Jersey, i. 190. 



De la Beche, his belief in successive 

 creations of new species, i. 55 ; his 

 figures of ichthyosauri, i. 176; on 

 different 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 Faluns 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. 



Dillwyn, Mr., his paper on tracheli- 

 pods, 298, 301. 



Diluvium, animals immediately pre- 

 ceding the formation of, i. 95. 



Dinotherium , largest of terrestrial mam- 

 malia, i. 92; found at Epplesheim, 

 in miocene strata, i. 135, 136; des- 

 cription of by Kaup, i. 136, 603 ; oc- 

 curs in France, Bavaria and Aus- 

 tria,i.l36, 601 ; giganteum, eighteen 

 feet long, i. 136; shoulder blade of, 

 like that of a mole, i. 136 ; uses of 

 tusks in the lower jaw of, i. 138; 

 molar teeth of resemble those of ta- 

 pirs, i. 137 ; an aquatic herbivorous 

 animal, i. 137, 139; adapted to a 

 lacustrine condition of the earth, i. 

 139 ; fossil head of found entire, i. 

 603, PI. 2' ; localities and description 

 of, ii. 18 ; proboscis and claws of, ii. 

 19. 



Dirt bed, soil of subterraneous forest in 

 Portland, i. 495, 496, 613. 



Disturbing forces, beneficial results of, 

 i. 539—541, 548. 



D'Orbigny, M., his classification of ce- 

 phalopodous mollusks, i. 382 ; trilo- 

 bites and shells found in the Andes 

 by, i. 389. 



Draco volans, has no true wings, i. 

 225. 



Dufrenoy, on iron mines in the Pyre- 

 nees, i. 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. 



