128 



Thompson, Mr., pentacrinus europjBus 

 discovered by, i. 432. 



Thomas, Mr. R., map and sections of 

 mining district near Redruth, i. 550. 



Tiedeniann, on bones in star-fish, i. 

 441. 



Tilgate forest, reptiles discovered by 

 Mr. Mantell in, i. 120. 



Time, lapse of long peiiods universally 

 admitted, i. 13 ; proof of long lapse 

 of, i. 116; proof of lapse of, during 

 deposition of strata, i. 377. 



Torpedo, fossil in tertiary strata, i. 291. 



Torre D'Orlando, fishes perished sud- 

 denly at, i. 124. 



Tortoises, number of existing families, 

 i. 255 ; divisions of fossil ditto, i. 

 256 ; extent of fossil species, i. 256 ; 

 marine species from Glaris, i. 257 ; 

 fossil land species, rare, i. 258 ; foot- 

 steps of in Scotland, i. 259 ; fresh- 

 water species, locality of, i. 258. 



Tour, supposed of a foreigner through 

 England, i. 1. 



Tours, Artesian wells in chalk of, i. 

 566. 



Townsend, Mr., on origin of springs,!. 

 560. 



Trachelipods, two sections of, carnivo- 

 rous and herbivorous, i. 297 ; carni- 

 vorous, perforate living shells, i. 

 298 ; carnivorous rare before the ter- 

 tiary strata, i. 299 ; herbivorous, ex- 

 tend through all strata to the present 

 time, i. 299 ; carnivorous succeeded 

 to functions of extinct carnivorous 

 cephalopods, i. 300, 312. 



Trachyte, character and phenomena 

 of, ii. 7. 



Trap, various phenomena of, ii. 6. 



Transition series, history and extent of, 

 i. 60 ; strata, character of their fossil 

 vegetables, i. 453. 



Transmutation of species, disproved in 

 the case of fishes, i. 294 ; theory of, 

 opposed by trilobites and animals 

 allied to them, i. 395 ; associated 

 with development by Lamarck, 585. 



Trevelyan, Mr. W. C, his discovery of 

 coprolites near Leith, i. 199. 



Trigonellites, are opercula of ammonites, 

 i. 618. 



Trilobites, geographical and geological 

 distribution of, i. 389 ; genera and 

 species of, i. 391 ; history and struc- 

 ture of, i. 391 ; living animals allied 

 to, i. 392, et seq. ; eyes of, i. 396 ; 

 physiological inferences from fossil 

 eyes, i. 401, et seq. 



Tryonix, fossil, localities of, i. 257. 



Trygon, fossil in tertiary strata, i. 291. 

 Tucker, his speculation as to possible 



existences in the interior of the earth, 



i. 57 ; his view of the relations of the 



world to man, i, 99. 

 Tufa, calcareous, local deposits of, ii. 



11. 

 Turin, bones in museum at, i. 93. 

 Turrilite, character and extent of, i. 



370. 

 Turtles, fossil, i. 256, 257. 



Ulodendron, character of, i. 475. 

 Unity, geological argument for the 

 unity of the Deity, i. 582, 583, 584. 



Val D'Arno, bones in fresh water 

 formation of, i. 93. 



Vapour, influence of, in causing eleva- 

 tions of land, i. 43. 



Vegetables, study of fossil, important, i. 

 450 ; recent sub-marine, divisions 

 of, i. 451 ; fossil sub-marine, divi- 

 sions of, i. 452 ; terrestrial, geologi- 

 cal distributions of, i. 452 ; remains 

 of, preserved in coal formation, i. 

 457, 458 ; remains of in transition 

 strata, i. 163, 459 ; genera, most 

 abundant in coal, i. 479 ; proportions 

 of families in coal formation, i. 480 ; 

 remains of, in secondary strata, i. 

 490 ; remains of, in tertiary strata, i. 

 507 ; numbers of fossil and recent 

 species, i. 521 ; characters of during 

 the three great geological epochs, i. 

 520 — 522 ; connection of with phy- 

 sico-theolcgy, i. 523. 



Veins, mineral, origin and disposition 

 of, i. 548, 550; most frequent in 

 early rocks, i. 549 ; theories respect- 

 ing oiigin of, i. 551 ; apparatus for 

 production of, i. 570 ; granitic, in- 

 tersecting older granite, ii. 4 ; of sie- 

 nite, porphyry, serpentine and green- 

 stone, intersecting other rocks, ii. 5 ; 

 mineral, influence of electro-magnetic 

 action in, ii. 107 — 109. 



Vertebrata, represented by fishes in the 

 transition formation, i. 62. 



Vision, organs of, in conchifers and 

 radiata, i. 605. 



Volcanos, present effect of, i. 47. 



Volcanic forces, their effects on the 

 condition of the globe, i. 49. 



Volcanic rocks, frequent in tertiary 

 strata, i. 89 ; of modern formation, 

 ii. 7. 



Voltz, M., on mantellia from Luneville, 

 i. 492 ; has discovered opercula of 

 ammonites, i. 618. 



