FOSSIL MOLLUSC A. 295 



four feet thick. The bank of fallen or accumulated 

 sand and shells will give the geologist plenty of 

 " boxing " to do, for the fossils are extremely abun- 

 dant, although usually in a very fragile state. The 

 Norwich Crag also crops up in the pretty river-side 

 calling place, Postwick Grove ; and at Whitlingham, 

 on the other side the river. Bramerton, however, has 

 long been regarded as the best place to get fossils at. 

 They are here in a remarkably good state of preserva- 

 tion, and there will be no difficulty in getting a score 

 or more species. The Crag lies on the top of the 

 chalk, and if the geologist lays bare the latter, he will 

 see it drilled again and again by boring mollusca, 

 showing that it was once the bare bed of the sea. 



Beyond Norwich there are several good places 

 where the later Pliocene shells may be collected, as 

 at Wroxham, Belaugh, Coltishall, Horstead, etc., all in 

 exceedingly picturesque districts, and not far from 

 the now celebrated "broads." Beds of shells also 

 occur on the Norfolk coast, between Cromer and 

 Sherringham, and at Weybourn, Runton, and Trim- 

 mingham. 



