'.■mifm 



JP O^ANtS AND rtoMieS. 



Elirenberg's Chalk with foramenifcra and layers of flint witli 

 echini (sea urchins). Above the Chalk was the Limestone of 

 Porte de Versailles. I had the remarkable good fortune of find- 

 Sng a grand slii>, exposing a fine specimen of the great Nautilus 

 •of which I had found two fragments in the preceding locality. 

 The entire Nautiltts (Janicua is 2 feet 1 inch in circumference. 

 This is about 3 inches larger than our largest Nautilus pom- 

 gjilius in the Museum, These with the associate Echini found 

 Sn both localities with the mineral glauconile identified the 

 two limestones. In the same limestones are abundance '". 

 species and numbers of a gasteropod Cerithium of small size 

 — one species stands out from the rest as Cerithitim gigan- 

 ieuni. The nunimulites at Meudon come between the Chalk 

 ami the Lower Limestone, and arc therefore of Eocene age 

 «(diiwn of the new). Vide Table. 



Foramenlfera — mHiola--iwy in size, were found in the 

 Geutilly Quarries, outwde of Paris, foiming limestone called 

 •Calcaire iniliulites. 



19. In addition to the Numniulites of the "Petra" of 

 I*ont Ste. Maxence, we have others at the base of the Olau- 

 "conite or Calcaire inferieur of Porte d« V«rsailles, or between 

 it and a thick bed of clay. The very extensive excavation of 

 this bed shows the extent of its use. Abundance of shark's 

 teeth were found among the numraulites. At Meudon I also 

 found nummwiites of larger size than the preceding between 

 the Chalk and the glauconites in a thin bed of marl. French 

 .j^eologists call these beds *^ NummuWqiie inferienr^^ (lower). 

 This implies a superieur (upper). These distinctions are 

 important, as we shall see, when we come to " mountain 

 'elevation." In our Museum collection there are nummulites 

 from Brackleshani, England, opposite the Isle of Wight. 

 These seem to be contemporaries of our Paris nummulitefs 

 anferioT or superior. England is their western limit of occur- 

 rence. From th e would now follow them to their eastera 

 limit. The Pyrt. s between France and Spain have their 

 tiummuline peaks. In the Alps of Brianconnais and Savoy 

 We have peaks of equal, and greater altitude than those of the 



