388 



PALEONTOLOGY 



ZONES OF THE LOWER JURASSIC Continued. 



* The existence of several other hemerae in the Deiran and Mercian is indicated by Mr. 

 Buckman, but they are not definitely established, and are therefore omitted. See Q uart. 

 Journ. Geol. Soc., vol. Ixxiii., pp. 257-327(1918). 



