I^TDEX TO THE PROCEEDIXGS. 



of Somersetshire and South "Wales, 

 557-566 ; measurements of the teeth 

 of Ehinoceros lepforhinus, 234 ; spe- 

 cies common to the Carboniferous 

 and Devonian formations, 674 ; oc- 

 curring in the Lower Devonian rocks 

 of ^orth Devon, and those found in 

 the same group on the Ehine, in 

 Belgium, and in France, 636 ; Lower, 

 Middle, and L'pper Devonian series 

 of North Devon and Petherwin (in 

 North Cornwall), showing those spe- 

 cies that pass into the Carboniferous 

 in any area, 669 ; Middle Devonian 

 rocks of South Devon compared with 

 those of North Devon and Europe, 

 and with the Carboniferous gene- 

 rally, 043; the distribution of Li- 

 fralias Corals, 22 ; species in the 

 Middle Devonian or Ilfracombe 

 group in North Devon and West 

 Somerset, 640; tlii'oughout the va- 

 rious fossil iferous groups in North 

 Devon, 375-380 ; fossils of the zone 

 of Ammonites planorbis, 301 ; Be- 

 lemnites acvitus, 304 ; showing the 

 entire fauna and flora of the Old 

 Red Sandstone and Devonian rocks 

 of Great Britain, and their compari- 

 son with those of the Ehenish-Prus- 

 sian, Belgian, and French series, 

 616-634; gi'oupiiigs of the Palaeo- 

 zoic rocks of North Devon and their 

 equivalents in South Devon, Corn- 

 wall, South Wales, Scotland, South 

 Ireland, and the three European 

 areas, 698 ; present census of species 

 in the Palaeozoic rocks of G-reat 

 Britain, 615; relation of the Mam- 

 mals of the Lower Brick-earths to 

 thePra^glacial and Postglacial fauna, 

 107 ; species common to the Middle 

 Devonian rocks of North Devon, 

 South Devon, and West Somerset, 

 650. 



Tate, R., Esq., on some Secondary- 

 Fossils from South Africa, 139 ; on 

 the fossiliferous development of the 

 Zone of Amr/ionifes angulatus, 

 Schloth., in Great Britain, 305 ; on 

 the Lower Lias of the North-east of 

 Ireland, 297. 



Tealby series of Lincolnshire, 244. 



Teign, Mr. G. Wareing Ormerod on 

 the geology of the upper part of the 

 valley of the, 185, 418. 



Tclerpefon Elghiense, Prof. T. H. Hux- 

 ley on a new specimen of, 77. 



Terrestrial fossils from Charter House, 

 493. 



Tertiaries, Mr. G. Maw on the sources 

 of the materials composing the white 

 clays of the Lower, 387. 



Tetford Hill, Lincolnshire, section of 

 a chalk-pit at, 240. 



Thames, Glacial and Postglacial depo- 

 sits of the valley of the, 396. 



Thames gravel, sections showing the 

 position and relations of the, 409 ; 

 valley, Mr. W. Boyd Dawkins on the 

 Lower Brick-earths of the, 91. 



Thetford, Norfolk, flint implements 

 from, 45. 



Thickness of Secondary beds within 

 and beyond the Somersetshire coal- 

 basin, 477. 



Thomson, J., Esq., and Dr. P. M. Dun- 

 can on Cyclophyllum, a new genus 

 of the Cya'thophyllidiB, with remarks 

 on the genus Aulophyllum, 327. 



Thornton, E., Esq., on the existence of 

 a large coal-field in the Province of 

 St. Catherine's, Brazil, 386. 



Timins, Rev. J. H., on the chemical 

 geology of the Malvern Hills. 352. 



Tin-grounds of the valley of the Teign, 

 419. 



Trades of Pferaspis?, 333. 



Trap-rocks, analyses of intrusive, 364 ; 

 from the Herefordshire Beacon, 

 analyses of bedded. 358. 



Trias of the Men dip Hills, 457. 



Trigonia Cassiope, 158. 



Goldfussi, 159. 



van, 159. 



ventricosa, 159. 



Trilobites from the Devonian rocks, 

 648, 666. 



Trochofoma Brocastellcnsis, 552. 



Lycettii, 552. 



Trochus apicalis, 553. 



Deslongchampsii, 553. 



EUzce, 554. 



gradatus, 553. 



HolweUensis, 554. 



Langanensis, 553. 



lafilabrus ?, 554. 



Trowse Junction, Norfolk, section at, 

 88. 



Tudor, Canada West, specimen of 

 Eozoon from, 257. 



Turbo Brocasfellcnsis, 555. 



Burtoni, 314. 



yiodulo-carmatus, 555. 



refici'.Iatus, 556. 



so/idu-'i, 554. 



Stowianu.s, 153. 



tumidus. 5.36. 



TurriteUa Hoivsei, 556. 



Rithidgeana, 152. 



