Tertiary limestone, notices of, in Asia 
+) Minor, 104. 
sandstone, account of, in Asia 
Minor, 104. 
and secondary series, noknown 
beds of passage between the, in the 
United States, 735, 741. 
Tetracauloden, Mr. Owen’s inquiry into 
the claims of the, to generic distinc- 
tion, 689; Mr. Koch’s observations on 
the distinct nature of the genus, 714, 
on the species named, 7. Godmanii, T. 
Kochii, 715, T. Tapiroides, 716 ; notice 
of Dr. Grant’s communication on the, 
770; Mr. Nasmyth on the minute 
structure of the tusks of 7. Godmanii, 
477, T. Kochii, $78, T. Tapiroides, 778. 
Thermal springs, account of, in Asia 
Minor, 106. 
Thompson (Mr.), account of boring for 
water near Poole, 413. 
Thylacotherium, Prof. Owen’s description 
of jaws of, 5, 17. 
Tierra del Fuego, Mr..Darwin’s account 
of the distribution of erratic boulders, 
and on contemporaneous deposits in, 
427; on the glaciers of, 429. 
Till, Mr. Darwin’s description of,in South 
America, 427; Mr. Lyell’s in Norfolk, 
171, 176. 
Toombuddra, account cf rock basins in 
the bed of the, 702. 
Tortoise, Mr. Owen on remains of a, from 
the chalk, 299. 
- Touraine, Mr. Lyell’s comparison of the 
fossils ef the faluns of, with those of 
the crag, 130, 443; and the miccene 
strata of Williamsburg (U. S.), 735 ; 
description of the faluns of, 459. 
Tours, Mr. Lyell cn the faluns south of, 
AA, 
Trachyte, account of, in Asia Minor, 105. 
Transition rocks, account of, in Bohemia, 
167. 
Trap, notice of, in Fife, 10; in Southern 
Africa, 102 
of Bleadon fill, 318; in Russia, 399; 
the Uralmountains, 747; in Heypt, 789. 
Treasurers’ Reports for 1838, 54; 18389, 
202 ; 1840, 381; 1841, 629. 
Trees, fossil, Mr. Hawkshaw’s account 
of, found at Dixon-fold, 189; addi- 
tional DE ee, 269; observations. on, 
by Mr. Bowman, 270; account of, 
found in Egypt, 7 86. 
Trevelyan (Sir J. )y. notice of a molar ofan 
» elephant found in the Bristo! Channel, 
and of Roman pottery in the Thames, 
139. 
Triassic fishes (Sir P. Egerton), an ac- 
-count of, in British strata, 409. 
INDEX. 
; at the western extremity - 
815 
Trichinopoly, notice of fossils found near, 
793. 
Trilobite slates, notices of, in De vonshire} 
117, 158. 
Trimmer (J. Esq.), on the detritus of 
part of Norfolk, 185; on the geolo- 
ea position of Cucullea decussata, 
156. 
Trimmingham, notices of the cliffs at, 172. 
Underclay, My. Logan’s account of the 
beds of, in South | Wales, 275. 
Ural Mountains, on the geological struc- 
ture of the, 742, 
Valognes, Mr. Lyell on tertiary strata 
near, 438. 
Vegetable remains, notices of,—by Mr. 
Hawkshaw, at Dixon-fold, 189,269, and 
Mr. Bowman, 270; by Mr. Lyell, from 
Mundesley, 175; by Mr. Logan, from 
the South Wales under-clay, 275: by 
Mr. Lyell, in the Pennsylvania coal- field, 
596; by Mr. Brodie, from the Hamp- 
shire coast, 592; the Vale of Ayles- 
bury, 781; emer on the, of the 
Permian system in Russia, 725; re- 
marks on the, of Egypt, by Lieut. 
Newbold, 786-788. 
Veins, notice of metallic, formed by vol- 
taic agency, 9; of electric currents in 
the, of Pennance mine, 755. 
Verdachellum, notice of fossils found 
near, (93. 
Vigors (N..A. Esq.), notice ef, in the obi- 
tuary of the President’s Address for 
184], 529. 
Virginia, account of the tertiary forma- 
tions of, 735. 
Volcanic rocks, notices of, in the Catace- 
caumene, 106; in the Island of Ma- 
deira, 351; at Aden, 355; in Heypt, 
789. 
Voleanos, account of the extinet, of the 
Catacecaumene, 166. 
Voltaic agency, remarks on formations of 
metallic veins by, 9. 
Voltz (M.), notice of, in the obituary of 
the President’s Address for 1841, 5388. 
Wainlode cliif, section of, 586. 
Wales, North, notice of sections through, 
by Prof. Sedgwick, 548; through Pem- 
brokeshire, by Mr. Maclauchlan, 448. 
Wardcur, on remains of fossil insects and 
isopods in the vale of, 1384, 780. 
Water, notices by Dr. Mitchell ef out- 
bursts of, from the chalk, 1384; on 
the temperature of a well, near Delhi, 
by Mr. Everest, 752; remarks onthe 
transporting power of currents of, by 
Mr. Hopkins, 763. 
Waterford Haven, Mr. Austin on the geo- 
logy around, 154, 360; on elevation of 
