,Sf ratification of Franpe and ^ngland^ 119 



P 'stoDe, with periwinkles and the twelve other fossil re- 



mains in their lower beds, that are mentioned of 

 Gentilly, p. 47. 



Ldofinois is a district (of chalk) NE. of Compiegne be- 

 tween the rivers Oyse and Anre, which bound the 

 basin of Paris, and tbrnns therein a consklerahlc reen* 

 tering angle, p. 39. 



LofigjjimeaUy 9 miles SW. by W., has 'siliceous freestone 

 and sand, containing the 13 kinds of shells, &c., found 

 at Gent'dh/ and Grignon, with the addition of balani : 

 towards the top of the hill a sand (probably alluvial) 

 contains lymnece and planorbis with siliceous wood, 

 and other parts of vegetables, p. 54 and 57- 



Mantesy 22 miles WSVV., is on the NW. edge of the 

 basin of Paris, and adjoins the chalk district without 

 it. p. 38 and 39. 



Maiilde Kiver, which empties itself into the Seine, is a^ 

 that place the limits of the basin of Paris, attheNW. 

 end of the (alkivinl) sands of Beaiice, which form its 

 crooked boundary SE. tlience to Nemours, p. 38 

 and 39. 



Mcanxy }g miles NE. by E., is situate at one extremity 

 of the gypseous district within the basin of Paris, and 

 Grissy is at another, p. 49« 



Meudon. Q miles SW., has chalk-pits, in which are layers 

 of flints about 6y feet apart, but no detached fiints in 

 its mass ; the upper part of the chalk is in a rubbly 

 state, with the clay of the superior strata in its inter- 

 stices. A stratum of coloured potters* clay, without 

 fossils, covers the chalk here, and extends south-east- 

 wardly to Gent illy : above this clay, coarse limestone 

 strata here occur, and the lower beds in the quarries 

 contain calyplreae, fungites, madrepores, muscles, 

 nummulites, oysters, periwinkles, pinnje, porpvtes, 

 pyrulae, solens, large tellines, and terebcllae; which 

 fossils are of the same kinds as those of the quarries 

 of GeiitUly and Grignon and on the top of Montmar' 

 ire* The gypsum soil occurs here upon the coarse 

 limestone soil ; there are only thin beds of plaster in it, 

 but which are sufficient to fix the relative super-posi- 

 tion of«these soils, pages 41, 43, 44, 47, 49, 53 and 55. 



Montmartre, 2| miles N., has had its strata and fossils de^ 

 scribed by M. Desniarets ; it has large plaster quarries 

 in which are three principal masses of gypsum, the low- 

 est of whieh is without fossils, and has only thin bedsof 

 j;ypsum, frequently sclenitous, with intervening strata 

 H4 of 



