246 



London Clay. 



Plants, birds, reptiles, and mammals all tell of the 

 immediate neighbourhood of land, and the marine 

 fossils now to be mentioned seem in fact to have lived 

 at the mouth of a great river. 

 FIG. 49. 



Cardita Brongniarti. Cassidaria striata. Nipadites ellipticus. 



Group of Fossils from the London Clay. 



Nearly 60 genera of fish have been noted from 

 the London Clay alone, including species of Lamna 



