Straiification of France and England. 1 29 



seous formation ; which thin seam can be traced in 

 the quarries, over a space of 27| miles long and 11 

 miles broad, p. 52. 

 TcreltUcB are found at Chaumont, Gentilly, Grignpn, 

 Gucspelle, Tssy, Meudon, Pallcry, Sevres, Vau- 

 girard, 8cc., in the lower beds of the coarse lime- 

 stone, p. 47. 

 Terehrnlula, see Anomites. 



Tliornhatk fish, fragments of the bones of, found in the 

 yellow argillaceous marie, above the thick green pot- 

 ters' earth of the gypsous formation* p. 52. 

 Tortoise bones are found at Dammartin, Montmartre, 

 Montmorency, &c., in the gypsum or mtervening 

 marles, of the upper gypsum mass. p. 51, 

 TreeSy trunks of, large palms (apparently), converted inla 

 silex, are found lyuig flat in a white and friable calca- 

 reous stratum, above the upper gypsum mass. p. 51. 



, large trunks of, of unknown species are found at 



Seran, &c.,inihe putrid alluvium (of the valleys). p. 58. 

 — ■ — sec Wood. 

 Trochi shells are found in the yellow argillaceous marie, 



near the upper part of the gypsous formation, p. 52. 

 Vegetables, see Leaves. 



Funis shells, roundish, are found at Gentilly, Saint-Ger- 

 main, Villepreux, &€-, in the building-stone rock of 

 the coarse limestone formation, p. 48. 



« , sometimes in fragments, are found in the yellow 



argillaceous marie near the top of the gypsous forma- 

 tion, p. 52. 

 FirmiculUes^ of three speci<5s, are found in the chalk strata. 



p. 42. 

 IVbod, bituminous, at Rolleboise, by the Seine river, in the 

 potters' or plastic clay formation, in which no other 

 organized remains have been found, p. 44. 



F siliceous or petrified, at Longjunjcau, on the tops 



of the hills in (a;luvial) sand. p. 5/. 



, sec IVi es. 



In order to supply, in some degree, the want of vertical 

 Sections across tt»e basin c»»' Paris, in some determinate di- 

 rections, best adapted for exhibiting the thicknesses and re- 

 lative positions of its several strata; (wliich section:, it is to 

 he hoped, will accompany the promisee; Memoir of M.Cuvier 

 and M. Bmgniart) ; 1 have, in the mean fmc, attempted 

 an arrangement jrom their abridged M» moir, which, per- 

 haps, you may deem worth a quarto na^e, to enable it to 

 be folded out at the end of this Letter, In this table, I 

 Vol. 35. No. 142. PeZ'. 1810, I have 



