PLATE IX. 



Fig. 



la and b. Ammonites Coupei ; from the Grey Chalk near Devizes, in the collection of 

 Mr. Cunnington. 



2a and 6. Ammonites cinctus ; from the Grey Chalk of Middleham, in the British 

 Museum, from the collection of Dr. Mantell : the original specimen de- 

 scribed by Dr. Mantell, and figured in the ' Mineral Conchology/ pi. 564. 



Sa, b, and c. Ammonites Bunburianus ; from the Chalk with siliceous grains of Chard- 

 stock, in the Museum of Practical Geology, from the collection of Mr. 

 Bunbury. 



