«J> 



PLATE XIX. 



Fig. vacf*<AS£ 



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

 in rny possession, p. 23. uMfos 



la, side view. 



lb, back view. 



lc, section of a whorl. 



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

 Isle of Wight ; in my possession, p. 41. 

 2a, side view. 

 2b, back view. 

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



3a and b. Ammonites octo-sulcatus ; from the Grey Chalk of Ventnor, Isle of Wight ; 

 in my possession, p. 42. 

 3a, 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. 

 43, front view. 



5a and b. Ammonites Deverianus ; from the Grey Chalk of Sussex ; in the British 

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

 5 a, side view. 

 5b, front view. 



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

 session, p. 39. 

 6, outline of a septum. 



