FOSSIL MOLLUSC A. 



265 



asper, Pecten Beaveri, Pecten qtcinquecostatus, Exogyra 

 cojiica, Ostrea carinata. The Warminster and Black- 

 down beds are also well known collecting-grounds for 

 fossils of this period. 



Fig. '2\if.—Fecten Beaveri (Greensaud). 



The Upper Chalk strata are always favourite 

 fossil-collecting beds to a young geologist. The 

 fossils look so pretty, when properly cleaned, in their 

 white matrix ; and, moreover, the eyes of the ardent 

 youth are not so likely to be fatigued or repelled by 



