FOSSIL CEPHALOPODS. 



3" 



bands of black limestone completely made up of 

 small Goniatites. In the shales which overlie the 



J 



Fig. yy^.— Ammonites hifrons. Fig. 310.— Side view of ditto 



impure coal-seams in the Millstone Grit of Yorkshire 



Fig. 311. — Ammonites communis. 



Fig. 312.— Side view of ditto. 



and Lancashire — best seen, perhaps, in the neighbour- 

 hood of Halifax and Oldham, we have a splendid 



