FOSSIL CEPHALOPODS. 



bands of black limestone completely made up of 

 small Goniatites. In the shales which overlie the 



Fig. 309. Ammonites bifrons. Fig. 310. Side view of ditto 



impure coal-seams in the Millstone Grit of Yorkshire 



(es commums. 



Fig. 312. Side view of ditto. 



and Lancashire best seen, perhaps, in the neighbour- 

 hood of Halifax and Oldham, we have a splendid 



