156 VISIT TO YORKSHIRE. [i860. 



doubt about the subject, no more than I have that the E. primi- 

 genius is above the Boulder Clay and the E. meridionalis in the 

 Norwich Crag. Also that the E. primigenius and E. antiquus 

 are found together in the newer beds at Erith, Ilford, Beading, 

 and some half-dozen other places I could name, have long satis- 

 fied me. 



If I could have spared time I should have much liked to have 

 gone over some of the coast with you and Mr Gunn. There is a 

 spot between Cromer and Weybourne where I have found bones 

 in situ, but there was nothing determinable. A further and 

 longer search was necessary. It was at the base of the cliff. 



Along the greater part of the Norfolk cliffs my belief is that 

 the mammalian remains are confined to the beds beneath the 

 Boulder Clay, and that they are not found in the Boulder Clay or 

 in the beds above it, with a few rare exceptions. Pray make 

 my kind regards to Mr Gunn, and believe me to be, ever truly 

 yours, JOSEPH PRESTWICH. 



Accompanied by Professor Morris, he started on a 

 Yorkshire excursion on the 17th July, and was joined 

 at Blisworth by Mr Samuel Sharp of Northampton. 

 Into this brief excursion, which occupied but a fort- 

 night, many important observations were crowded. 

 Besides the occurrence of " Drift," our geologist was 

 in quest of Boulder Clay, and his pen and pencil 

 were fully engaged. After seeing the Dallington pits 

 they proceeded from Kettering to Bockingham, and 

 then to a close inspection of the cliffs at Bridlington, 

 Filey, and Speeton. 



At Scarborough Mr Leckenby's collection was visited, 

 where Prestwich took note of a specimen of Cyrena 

 consobrina (fluminalis), found in gravel at Hedon, 

 near Hull. 



From gravel-pits at Beverley their next point was 

 Market Weighton, where a section is drawn of a large 

 white gravel-pit ; thence to Holmehill, Bidgemont, Paul 



