IN THE PARIS BASIN. 



5^ 



MoucHY. — The section of Mouchy is on the road between 

 Fercourt and Fayel, one mile south of Mouchy. It is only a few- 

 feet in height, on either side of the road, in very white Calcaire 

 Grossier, exceedingly fossiliferous, with spendidly preserved speci- 

 mens, many with colour markings. 



MouY. — On the same road towards Mouy, several sections 

 occur in Middle and Upper Calcaire Grossier. 



St. Felix (Fay-sous-Bois). — This exposure, about two miles 

 to the north of Heilles-Mouchy station, is in very fossiliferous 

 Calcaire Grossier. 



PoNCHON. — Showing fossiliferous sands at the base of the 

 Calcaire Grossier, &c. 



NoAiLLES. — This section is close to the town, and is an im- 

 portant one, having produced some fine fossils. We were not 

 rewarded in our searches, but stratigraphically the exposure is 

 interesting. 



Bracheux AND Abbecourt. — Leave Heilles-Mouchy station 

 for St. Sulpice, near Abbecourt, or walk from Mouchy on the 

 road to Beauvais (about eight miles). 



The typical fossiliferous locality of the sands of Bracheux is in 

 a wood called Bois d'Epine, one mile north of Abbecourt. Two 

 other sand-pits exist near Les Godins, half-a-mile north of St. 

 Sulpice. 



In the valley east of St. Sulpice, the Greensand, Gault and 

 Chalk are met with, and on the hill slopes the Bracheux sands 

 are found in pockets resting on the last mentioned formation. 



MORTEFONTAINE CENTRE.— CTwenty-two miles N.E. of Paris.) 



After studying the above-named sections, we have the choice 

 of two routes, one east towards Soissons, and another south-east 

 to Senlis and neighbourhood. The latter being nearer Paris, we 

 will describe it first. The most central town for our purpose is 

 Mortefontaine. 



If approached from Paris, take train (Gare du Nord) to Sur- 

 villiers, and omnibus from the latter to Mortefontaine where there 

 is a fairly comfortable hotel. 



