272 



PICTURESQUE SKETCHES 



abound in the most remarkable profusion. Upwards 

 of two hundred species of these shells (Cerithium, 

 fig. 116) are found in the older tertiary beds of 

 Europe. The nautilus is retained in these beds, 



Fig. 116 



Fig. 114 



Fig.lM 



EOCENE SHELLS.* 



especially in the London clay (the most distinct 

 marine deposit), but it has ceased to be the represen- 

 tative of the prevailing 

 group of mollusca. In 

 addition to the shells 

 there are in the beds 

 at Sheppey a multitude 

 of the remains of crabs 

 and lobsters, some of 

 them exceedingly per- 

 fect, indicating the vi- 

 CRUSTACEAN. cmity of ft coast _li ne at 



the time when this part of the series was deposited. 

 One of these is figured (118), to give an idea of 

 the near resemblance of them to existing species. 

 Figures are also given (119, 120) of a species of 



* Fig. 114, Lucina. Fig. 115, Corbula. Fig. 116, Cerithium. 

 Fig. 117, Cone. 



