PLATE XIX. 



Fig. 1 M sV W (p Wo tev<v s 



la, h, and c. Ammonites Coupei ; var., from the Grey Chalk of Ventnor, Isle of Wight ; 

 in my possession, p. 23. 



1<2, side view. 



\h, back view. 



Ic, section of a whorl. 



v 2a, b, and c. Ammonites Renauxianus ; a young shell, from the Grey Chalk of Ventnor, 



' , ^«^' Isle of Wight; in my possession, p. 41. 



^,, ^V«\*''^^ ^^ 2«, side view. 



2b, back view. 

 3c, front view of inner whorl of the same specimen. 



2>a and b. Ammonites octo-sulcatus ; from the Grey Chalk of Ventnor, Isle of Wight ; 

 in my possession, p. 42. 

 3«, side view, 

 2>b, front view. 



4a and b. Ammonites Icenicus ; from the Upper Chalk, near Norwich; in the collection 

 of Mr. King of Norwich, p. 43. 

 4a, side view, showing the outline of a septum. 

 4^j front view. 



5a and ^. Ammonites Deveri anus ; from the Grey Chalk of Sussex; in the British 

 Museum, from the collection of F. Dixon, Esq., p. 43. 

 5a, side view. 

 55, front view. 



6. Ammonites Veiled^; from the Grey Chalk of Ventnor, Isle of Wight; in my pos- 

 session, p. 39. 

 6, outline of a septum. 



