RHIZOPODA FORA MIN/FE RA . 



8l 



of the Paris basin, the Fdbularia discolithes (Fig. 14) of Defrance, 

 and the Alveolina ovoUea of d'Orbigny (Fig. 15) are found, and the 



Fig. 12. Nummulites Rouaulti (d'Archiac and J. Haime). 



Fig. 13.- Calcarina (Siderolites) calcitrapoides (Lamarck), natural size and magnified. 



Dactylopora cylindracea of Lamarck (Fig. 16) is found in the eocene 

 formation of Valmondois, and in the chalk of Grignon. At first, 



