434 



C. MALAISE. — 



ÉVOLUTION DE L'ÉCHELLE STRATIGRAPHIQUE 



Massif du Brabant. 



Bellerophon acutus Sow. 



— bilobatus Sow. 



— carinatus Sow. 

 Pleurotomaria latifasciata Portl. 



Lamellibranches. 

 Ortkonota sp. 

 Grammysia sp. 

 Cypricardia sp. 

 Cucullella sp. 

 Nucula sp. 

 Ctenodonta sp. 

 Cardiola sp. 



Modiolopsis orbicnlaris Sow. 

 Myalina sp. 

 Avicula sp. 



Brachiopodes. 

 Atrypa marginalis Daim. 

 Leptœna sericea Sow. 

 Strophomena antiquata Sow. 



— corrugatella Dav. 



— eitglypfia Daim. 



— imbrex Pand., var, 



globosa. 



— rfwniboidalis Wilk. 



— tenuistriata Sow. 

 Orthis Actoniœ Sow. 



— biforata Schloth. sp. 



— calligramma Daim. 



— flabellulum Sow. 



— grandis Sow. 



— hirnantensis Me Coy. 



— porcata Me Coy. 



— testudinaria Daim. 



— vespertilio Sow. 



Bryozoaires. 



Relepora sp. 



Ptilodyctia complanata Me Coy. 



Bande de Sambre-et- Meuse. 



Sphœronites stelluli férus Sait. 



Ciunoïdes. 

 Glyptocrinus basalis Me Coy. 

 Tiges d'encrines. 



Anthozoaires. 

 Petraia subduplicalaMc Coy. 



senii- 



