PLATE XL 



Fig. 10. 



Ammonites Traskii. 

 Natural size. 



PAGE 



63 



Fig. 12. A. RAMOSTJS. 



Slightly diminished in size. 

 12 it. Section of a volution. 



Fig. 13. 



A. HOFFMANNII. 



§ Natural size. 



13 a. Section of volution. 



65 



