496 



STRATIGEAPHICAL GEOLOGY 



Fis;. 171. GROUP OF UPPER CHALK FOSSILS. 



a. Belemnitella mucronata. 



b. Terebvatula earnea. 



c. Spondylus spinosus. 



d. Galerites conicus. 



e. Echinocorys rulgaris. 



/. Marsupites tcstudinaritis. 



g. Micraster coranguinum. 

 ii. Leskei (base). 

 i. ,, precursor (base). 

 A-. ,, coranguinum " 



